what allows the is-is routing protocol to operate on ipv6 networks?

IPv6 Routing: IS-IS Support for IPv6

This module describes how to configure Integrated Intermediate System-to-Intermediate Organization (IS-IS) for IPv6. IS-IS is an Interior Gateway Protocol (IGP) that advertises link-state information throughout the network to create a moving-picture show of the network topology. IS-IS is an Open Systems Interconnection (OSI) hierarchical routing protocol that designates an intermediate system equally a Level i or Level 2 device. Level 2 devices route betwixt Level i areas to create an intradomain routing courage. Integrated IS-IS uses a single routing algorithm to support several network accost families, such as IPv6, IPv4, and OSI.

Finding Feature Information

Your software release may not support all the features documented in this module. For the latest caveats and feature information, see Problems Search Tool and the release notes for your platform and software release. To find information about the features documented in this module, and to see a listing of the releases in which each characteristic is supported, see the feature information tabular array.

Use Cisco Characteristic Navigator to find information nearly platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/​get/​cfn. An account on Cisco.com is not required.

Information About IPv6 Routing: IS-IS Support for IPv6

IS-IS Enhancements for IPv6

IS-IS in IPv6 functions the same and offers many of the same benefits equally IS-IS in IPv4. IPv6 enhancements to IS-IS allow IS-IS to advertise IPv6 prefixes in addition to IPv4 and OSI routes. Extensions to the IS-IS command-line interface (CLI) allow configuration of IPv6-specific parameters. IPv6 IS-IS extends the address families supported by IS-IS to include IPv6, in improver to OSI and IPv4.

IS-IS in IPv6 supports either single-topology fashion or multiple topology mode.

IS-IS Single-Topology Support for IPv6

Unmarried-topology support for IPv6 allows IS-IS for IPv6 to be configured on interfaces along with other network protocols (for example, IPv4 and Connectionless Network Service [CLNS]). All interfaces must be configured with the identical set up of network address families. In improver, all routers in the IS-IS area (for Level i routing) or the domain (for Level 2 routing) must back up the identical set up of network layer accost families on all interfaces.

When single-topology support for IPv6 is being used, either old- or new-fashion TLVs may exist used. Withal, the TLVs used to advertise reachability to IPv6 prefixes apply extended metrics. Cisco routers do not let an interface metric to be set to a value greater than 63 if the configuration is non set up to support only new-style TLVs for IPv4. In single-topology IPv6 style, the configured metric is always the same for both IPv4 and IPv6.

IPv6 IS-IS Local RIB

A router that is running IS-IS IPv6 maintains a local RIB in which it stores all routes to destinations it has learned from its neighbors. At the end of each SPF, IS-IS attempts to install the best (that is, the to the lowest degree-toll) routes to a destination present in the local RIB in the global IPv6 routing table.

How to Configure IPv6 Routing: IS-IS Back up for IPv6

Configuring Single-Topology IS-IS for IPv6

Configuring IS-IS comprises two activities. The starting time activity creates an IS-IS routing procedure and is performed using protocol-independent IS-IS commands. The second action in configuring IPv6 IS-IS configures the operation of the IS-IS protocol on an interface.

Before Y'all Begin

Before configuring the router to run IPv6 IS-IS, globally enable IPv6 using the ipv6 unicast-routing global configuration control.


Note


If y'all are using IS-IS single-topology back up for IPv6, IPv4, or both IPv6 and IPv4, you may configure both IPv6 and IPv4 on an IS-IS interface for Level ane, Level 2, or both Level 1 and Level 2. However, if both IPv6 and IPv4 are configured on the aforementioned interface, they must be running the aforementioned IS-IS level. That is, IPv4 cannot exist configured to run on IS-IS Level i simply on a specified GigabitEthernet or FastEthernet interface while IPv6 is configured to run IS-IS Level 2 but on the same GigabitEthernet or FastEthernet interface.

>
SUMMARY STEPS

    1. enable

    2. configure terminal

    three. router isis area-tag

    4. net network-entity-title

    v. get out

    half dozen. interface type number

    vii. ipv6 address { ipv6-accost / prefix-length | prefix-proper name sub-$.25 / prefix-length

    8. ipv6 router isis area-name


DETAILED STEPS
    Command or Action Purpose
    Step 1 enable

    Example:

    Router> enable

    Enables privileged EXEC mode.

    • Enter your password if prompted.

    Stride two configure terminal

    Example:

    Router# configure terminal

    Enters global configuration way.

    Step three router isis area-tag

    Example:

    Router(config)# router isis area2

    Enables IS-IS for the specified IS-IS routing process, and enters router configuration fashion.

    Step iv net network-entity-title

    Example:

    Router(config-router)# net 49.0001.0000.0000.000c.00

    Configures an IS-IS network entity title (NET) for the routing process.

    • The network-entity-title argument defines the area addresses for the IS-IS area and the system ID of the router.

    Step v go out

    Example:

    Router(config-router)# leave

    Exits router configuration mode and enters global configuration manner.

    Step 6 interface type number

    Example:

    Router(config)# interface GigabitEthernet 0/0/i

    Specifies the interface type and number, and enters interface configuration fashion.

    Step 7 ipv6 address { ipv6-address / prefix-length | prefix-proper name sub-bits / prefix-length

    Case:

    Router(config-if)# ipv6 address 2001:DB8::three/64

    Specifies the IPv6 network assigned to the interface and enables IPv6 processing on the interface.

    Note

    Refer to the Implementing IPv6 Addressing and Basic Connectivity module for more information on configuring IPv6 addresses.

    Stride 8 ipv6 router isis area-proper name

    Case:

    Router(config-if)# ipv6 router isis area2

    Enables the specified IPv6 IS-IS routing process on an interface.

    Customizing IPv6 IS-IS

    Perform this task to configure a new administrative distance for IPv6 IS-IS, configure the maximum number of equal-cost paths that IPv6 IS-IS will back up, configure summary prefixes for IPv6 IS-IS, and configure an IS-IS case to advertise the default IPv6 route (::/0). It also explains how to configure the hold-down catamenia between fractional route calculations (PRCs) and how ofttimes Cisco IOS XE software performs the SPF calculation when using multitopology IS-IS.

    Y'all tin customize IS-IS multitopology for IPv6 for your network, only yous likely will not need to practise and so. The defaults for this feature are set to meet the requirements of most customers and features. If you change the defaults, refer to the IPv4 configuration guide and the IPv6 command reference to find the advisable syntax.

    SUMMARY STEPS

      1. enable

      2. configure terminal

      three. router isis area-tag

      4. address-family ipv6 [ unicast | multicast ]

      v. default-information originate [ route-map map-proper noun ]

      vi. altitude value

      7. maximum-paths number-paths

      8. summary-prefix ipv6-prefix prefix-length level-1 | level-1-2 | level-two ]

      ix. red china-interval seconds [ initial-wait ] [ secondary-await

      10. spf-interval [ level-1 | level-two ] seconds initial-wait ] [ secondary-wait

      11. exit

      12. interface type number

      13. isis ipv6 metric metric-value [ level-ane | level-2 | level-1-2


    DETAILED STEPS
      Command or Activeness Purpose
      Footstep 1 enable

      Example:

      Router> enable

      Enables privileged EXEC mode.

      • Enter your password if prompted.

      Pace 2 configure terminal

      Example:

      Router# configure last

      Enters global configuration mode.

      Pace 3 router isis area-tag

      Example:

      Router(config)# router isis area2

      Enables IS-IS for the specified IS-IS routing process, and enters router configuration mode.

      Pace 4 accost-family ipv6 [ unicast | multicast ]

      Example:

      Router(config-router)# address-family unit ipv6

      Specifies the IPv6 accost family, and enters accost family configuration mode.

      • The unicast keyword specifies the unicast IPv6 unicast address family. Past default, the router is placed in configuration style for the unicast IPv6 address family if the unicast keyword is non specified with the accost-family ipv6 command.

      Step v default-data originate [ route-map map-name ]

      Case:

      Router(config-router-af)# default-information originate

      (Optional) Injects a default IPv6 route into an IS-IS routing domain.

      • The road-map keyword and map-name argument specify the conditions under which the IPv6 default route is advertised.

      • If the route map keyword is omitted, so the IPv6 default route will be unconditionally advertised at Level 2.

      Step 6 distance value

      Example:

      Router(config-router-af)# distance 90

      (Optional) Defines an administrative distance for IPv6 IS-IS routes in the IPv6 routing tabular array.

      • The value argument is an integer from 10 to 254. (The values 0 to nine are reserved for internal utilize).

      Footstep 7 maximum-paths number-paths

      Example:

      Router(config-router-af)# maximum-paths 3

      (Optional) Defines the maximum number of equal-cost routes that IPv6 IS-IS tin can back up.

      • This command also supports IPv6 Border Gateway Protocol (BGP) and Routing Data Protocol (RIP).

      • The number-paths argument is an integer from 1 to 64. The default for BGP is i path; the default for IS-IS and RIP is 16 paths.

      Step viii summary-prefix ipv6-prefix prefix-length level-ane | level-ane-2 | level-ii ]

      Example:

      Router(config-router-af)# summary-prefix 2001:DB8::/24

      (Optional) Allows a Level 1-2 router to summarize Level 1 prefixes at Level ii, instead of advertising the Level i prefixes directly when the router advertises the summary.

      • The ipv6-prefix statement in the summary-prefix command must be in the form documented in RFC 2373 where the accost is specified in hexadecimal using 16-bit values between colons.

      • The prefix-length argument is a decimal value that indicates how many of the high-order contiguous bits of the accost incorporate the prefix (the network portion of the address). A slash mark must precede the decimal value.

      Step 9 prc-interval seconds [ initial-wait ] [ secondary-await

      Case:

      Router(config-router-af)# communist china-interval 20

      (Optional) Configures the concord-down period between PRCs for multitopology IS-IS for IPv6.

      Step 10 spf-interval [ level-1 | level-2 ] seconds initial-wait ] [ secondary-wait

      Example:

      Router(config-router-af)# spf-interval 30

      (Optional) Configures how often Cisco IOS XE software performs the SPF adding for multitopology IS-IS for IPv6.

      Stride 11 go out

      Example:

      Router(config-router-af)# exit

      Exits address family configuration mode, and returns the router to router configuration mode.

      • Repeat this step to get out router configuration mode and return the router to global configuration mode.

      Step 12 interface type number

      Example:

      Router(config-router)# interface GigabitEthernet 0/0/ane

      Specifies the interface type and number, and enters interface configuration manner.

      Footstep xiii isis ipv6 metric metric-value [ level-1 | level-2 | level-i-2

      Example:

      Router(config-if)# isis ipv6 metric 20

      (Optional) Configures the value of an multitopology IS-IS for IPv6 metric.

      Disabling IPv6 Protocol-Support Consistency Checks

      Perform this task to disable protocol-back up consistency checks in IPv6 single-topology way.

      For single-topology IS-IS IPv6, routers must exist configured to run the same set of address families. IS-IS performs consistency checks on hi packets and will reject hello packets that practice not have the same set of configured address families. For instance, a router running IS-IS for both IPv4 and IPv6 will not form an adjacency with a router running IS-IS for IPv4 or IPv6 only. In order to let adjacency to exist formed in mismatched accost-families network, the adjacency-cheque command in IPv6 address family unit configuration mode must be disabled.


      Note


      Entering the no adjacency-bank check command can adversely affect your network configuration. Enter the no adjacency-check command only when yous are running IPv4 IS-IS on all your routers and you want to add IPv6 IS-IS to your network but you need to maintain all your adjacencies during the transition. When the IPv6 IS-IS configuration is consummate, remove the no adjacency-check command from the configuration.


      SUMMARY STEPS

        ane. enable

        two. configure terminal

        3. router isis area-tag

        four. address-family ipv6 [ unicast | multicast ]

        5. no adjacency-check


      DETAILED STEPS
        Command or Activeness Purpose
        Footstep 1 enable

        Case:

        Device> enable

        Enables privileged EXEC mode.

        • Enter your password if prompted.

        Stride ii configure terminal

        Instance:

        Device# configure terminal

        Enters global configuration fashion.

        Step 3 router isis area-tag

        Example:

        Device(config)# router isis area2

        Enables IS-IS for the specified IS-IS routing procedure, and enters router configuration fashion.

        Stride 4 address-family ipv6 [ unicast | multicast ]

        Example:

        Device(config-router)# address-family ipv6

        Specifies the IPv6 address family unit, and enters address family configuration manner.

        • The unicast keyword specifies the unicast IPv6 unicast address family. By default, the router is placed in configuration fashion for the unicast IPv6 accost family if the unicast keyword is not specified with the address-family ipv6 command.

        Step v no adjacency-check

        Example:

        Device(config-router-af)# no adjacency-check

        Disables the IPv6 protocol-support consistency checks performed on hello packets, assuasive IPv6 to be introduced into an IPv4-only network without disrupting existing adjacencies.

        • The adjacency-check command is enabled by default.

        Disabling IPv4 Subnet Consistency Checks

        Perform this task to disable IPv4 subnet consistency checking when forming adjacencies. software historically makes checks on hullo packets to ensure that the IPv4 address is present and has a consistent subnet with the neighbor from which the howdy packets are received. To disable this check, employ the no adjacency-check command in the router configuration fashion. Notwithstanding, if multitopology IS-IS is configured, this check is automatically suppressed, considering multitopology IS-IS requires routers to form an adjacency regardless of whether or not all routers on a LAN support a common protocol.

        SUMMARY STEPS

          1. enable

          2. configure terminal

          three. router isis area-tag

          four. no adjacency-check


        DETAILED STEPS
          Command or Action Purpose
          Step 1 enable

          Example:

          Device> enable

          Enables privileged EXEC mode.

          • Enter your password if prompted.

          Step 2 configure terminal

          Instance:

          Device# configure terminal

          Enters global configuration manner.

          Step 3 router isis area-tag

          Instance:

          Device(config)# router isis area2

          Enables IS-IS for the specified IS-IS routing procedure, and enters router configuration mode.

          Step 4 no adjacency-check

          Example:

          Device(config-router-af)# no adjacency-check

          Disables the IPv6 protocol-support consistency checks performed on hello packets, allowing IPv6 to be introduced into an IPv4-only network without disrupting existing adjacencies.

          • The adjacency-cheque control is enabled by default.

          Verifying IPv6 IS-IS Configuration and Functioning

          SUMMARY STEPS

            ane. enable

            2. show ipv6 protocols [ summary ]

            three. bear witness isis [ procedure-tag ] [ ipv6 | * ] topology

            iv. testify clns [ process-tag ] neighbors interface-type interface-number ] [ area ] [ item ]

            v. show clns area-tag is-neighbors [ type number ] [ detail ]

            vi. show isis [ procedure-tag ] database [ level-1 ] [ level-two ] [ l1 ] [ l2 ] [ detail ] [ lspid ]

            7. prove isis ipv6 rib [ ipv6-prefix ]


          DETAILED STEPS
            Command or Activeness Purpose
            Stride 1 enable

            Example:

            Device> enable

            Enables privileged EXEC way.

            • Enter your password if prompted.

            Step 2 show ipv6 protocols [ summary ]

            Case:

            Device# bear witness ipv6 protocols

            Displays the parameters and current state of the agile IPv6 routing processes.

            Footstep iii evidence isis [ procedure-tag ] [ ipv6 | * ] topology

            Example:

            Device# show isis topology

            Displays a listing of all connected routers running IS-IS in all areas.

            Footstep 4 testify clns [ process-tag ] neighbors interface-type interface-number ] [ expanse ] [ detail ]

            Example:

            Device# show clns neighbors detail

            Displays end organisation (ES), intermediate system (IS), and multitopology IS-IS (M-ISIS) neighbors.

            Stride v show clns area-tag is-neighbors [ blazon number ] [ detail ]

            Example:

            Device# show clns is-neighbors detail

            Displays IS-IS adjacency data for IS-IS neighbors.

            • Use the detail keyword to brandish the IPv6 link-local addresses of the neighbors.

            Footstep 6 show isis [ process-tag ] database [ level-1 ] [ level-two ] [ l1 ] [ l2 ] [ particular ] [ lspid ]

            Example:

            Device# evidence isis database item

            Displays the IS-IS link-state database.

            • In this example, the contents of each LSP are displayed using the particular keyword.

            Step 7 show isis ipv6 rib [ ipv6-prefix ]

            Case:

            Device# prove isis ipv6 rib

            Displays the IPv6 local RIB.

            Configuration Examples for IPv6 Routing: IS-IS Back up for IPv6

            Example: Customizing IPv6 IS-IS

            The following example advertises the IPv6 default road (::/0)--with an origin of GigabitEthernet interface 0/0/1--with all other routes in router updates sent on GigabitEthernet interface 0/0/1. This example also sets an administrative distance for IPv6 IS-IS to 90, defines the maximum number of equal-cost paths that IPv6 IS-IS will support as 3, and configures a summary prefix of 2001:DB8::/24 for IPv6 IS-IS.

            router isis   address-family ipv6  default-data originate  distance 90  maximum-paths 3  summary-prefix 2001:DB8::/24  exit

            Example: Disabling IPv6 Protocol-Support Consistency Checks

            The following example disables the adjacency-check control to allow a network administrator to configure IPv6 IS-IS on the router without disrupting the existing adjacencies:

            router isis   address-family ipv6  no adjacency-bank check

            Example: Configuring IS-IS for IPv6

            In the following example, output data about the parameters and current state of that active IPv6 routing processes is displayed using the evidence ipv6 protocols command:

            Device#                                  testify ipv6 protocols                                IPv6 Routing Protocol is "connected" IPv6 Routing Protocol is "static" IPv6 Routing Protocol is "isis"   Interfaces:     GigabitEthernet0/0/three     GigabitEthernet0/0/i     Serial1/0/1     Loopback1 (Passive)     Loopback2 (Passive)     Loopback3 (Passive)     Loopback4 (Passive)     Loopback5 (Passive)   Redistribution:     Redistributing protocol static at level 1   Address Summarization:     L2: 2001:DB8:33::/16  advertised with metric 0     L2: 2001:DB8:44::/sixteen  advertised with metric twenty     L2: 2001:DB8:66::/sixteen  advertised with metric x     L2: 2001:DB8:77::/16  advertised with metric x

            In the following example, output data about all connected routers running IS-IS in all areas is displayed using the show isis topology command:

            Device#                                  show isis topology                                IS-IS paths to level-one routers System Id       Metric  Next-Hop        Interface       SNPA 0000.0000.000C  0000.0000.000D  20      0000.0000.00AA  Se1/0/one         *HDLC* 0000.0000.000F  x      0000.0000.000F  GE0/0/1         0050.e2e5.d01d 0000.0000.00AA  10      0000.0000.00AA  Se1/0/1         *HDLC* IS-IS paths to level-2 routers System Id       Metric  Next-Hop        Interface       SNPA 0000.0000.000A  10      0000.0000.000A  GE0/0/iii         0010.f68d.f063 0000.0000.000B  20      0000.0000.000A  GE0/0/three         0010.f68d.f063 0000.0000.000C  -- 0000.0000.000D  xxx      0000.0000.000A  GE0/0/3         0010.f68d.f063 0000.0000.000E  xxx      0000.0000.000A  GE0/0/3         0010.f68d.f063

            In the following case, output data to confirm that the local router has formed all the necessary IS-IS adjacencies with other IS-IS neighbors is displayed using the prove clns is-neighbors control. To display the IPv6 link-local addresses of the neighbors, specify the detail keyword.

            Device#                                  prove clns is-neighbors detail                                System Id      Interface   State  Type Priority  Circuit Id         Format 0000.0000.00AA Se1/0/ane     Upwardly     L1   0         00                 Phase V   Area Address(es): 49.0001   IPv6 Address(es): FE80::YYYY:D37C:C854:v   Uptime: 17:21:38 0000.0000.000F Et0/0/1     Upwards     L1   64        0000.0000.000C.02  Phase V   Expanse Address(es): 49.0001   IPv6 Address(es): FE80::XXXX:E2FF:FEE5:D01D   Uptime: 17:21:41 0000.0000.000A Et0/0/3     Upwards     L2   64        0000.0000.000C.01  Stage Five   Expanse Address(es): 49.000b   IPv6 Address(es): FE80::ZZZZ:F6FF:FE8D:F063   Uptime: 17:22:06

            In the post-obit example, detailed output information that displays both end system (ES) and intermediate system (IS) neighbors is displayed using the bear witness clns neighbors command with the particular keyword.

            Device#                                  prove clns neighbors detail                                Arrangement Id          Interface    SNPA            State  Holdtime  Type Protocol 0000.0000.0007     GE3/3        aa00.0400.6408  UP     26        L1   IS-IS Surface area Address(es): 20 IP Address(es): 172.16.0.42* Uptime: 00:21:49 0000.0C00.0C35     GE3/2        0000.0c00.0c36  Upwardly     91        L1   IS-IS Area Address(es): twenty IP Accost(es): 192.168.0.42* Uptime: 00:21:52 0800.2B16.24EA     GE3/three        aa00.0400.2d05  Up     27        L1   One thousand-ISIS Surface area Address(es): 20 IP Accost(es): 192.168.0.42* IPv6 Address(es): FE80::2B0:8EFF:FE31:EC57 Uptime: 00:00:27 0800.2B14.060E     GE3/ii        aa00.0400.9205  Up     eight         L1   IS-IS Area Accost(es): 20 IP Address(es): 192.168.0.30* Uptime: 00:21:52

            In the following example, detailed output data about LSPs received from other routers and the IPv6 prefixes they are advert is displayed using the show isis database command with the detail keyword specified:

            Device#                                  show isis database detail                                IS-IS Level-ane Link State Database LSPID                 LSP Seq Num  LSP Checksum  LSP Holdtime  ATT/P/OL 0000.0C00.0C35.00-00  0x0000000C   0x5696        325           0/0/0   Area Address: 47.0004.004D.0001   Expanse Address: 39.0001   Metric: ten   IS 0000.0C00.62E6.03   Metric: 0    ES 0000.0C00.0C35  --More than-- 0000.0C00.40AF.00-00* 0x00000009   0x8452        608           1/0/0   Area Address: 47.0004.004D.0001   Topology: IPv4 (0x0) IPv6 (0x2)   NLPID: 0xCC 0x8E   IP Accost: 172.16.21.49   Metric: ten   IS 0800.2B16.24EA.01   Metric: x   IS 0000.0C00.62E6.03   Metric: 0    ES 0000.0C00.40AF   IPv6 Address: 2001:DB8::/32   Metric: 10   IPv6 (MT-IPv6) 2001:DB8::/64   Metric: 5    IS-Extended cisco.03   Metric: 10   IS-Extended cisco1.03   Metric: x    IS (MT-IPv6) cisco.03 IS-IS Level-two Link State Database: LSPID                 LSP Seq Num  LSP Checksum  LSP Holdtime      ATT/P/OL 0000.0000.000A.00-00  0x00000059   0x378A        949               0/0/0   Area Accost: 49.000b   NLPID:        0x8E   IPv6 Address: 2001:DB8:one:i:1:1:i:1   Metric: 10         IPv6 2001:DB8:2:YYYY::/64   Metric: ten         IPv6 2001:DB8:3:YYYY::/64   Metric: ten         IPv6 2001:DB8:ii:YYYY::/64   Metric: 10         IS-Extended 0000.0000.000A.01   Metric: x         IS-Extended 0000.0000.000B.00   Metric: 10         IS-Extended 0000.0000.000C.01   Metric: 0          IPv6 11:ane:YYYY:one:1:1:one:1/128   Metric: 0          IPv6 xi:2:YYYY:one:1:1:one:1/128   Metric: 0          IPv6 11:3:YYYY:one:i:1:1:1/128   Metric: 0          IPv6 11:4:YYYY:ane:1:1:one:1/128   Metric: 0          IPv6 11:five:YYYY:ane:1:1:1:one/128 0000.0000.000A.01-00  0x00000050   0xB0AF        491               0/0/0   Metric: 0          IS-Extended 0000.0000.000A.00   Metric: 0          IS-Extended 0000.0000.000B.00

            The post-obit example shows output from the show isis ipv6 rib command. An asterisk (*) indicates prefixes that have been installed in the master IPv6 RIB as IS-IS routes. Following each prefix is a list of all paths in order of preference, with optimal paths listed offset and suboptimal paths listed after optimal paths.

            Device#                                  show isis ipv6 rib                                IS-IS IPv6 process "", local RIB   2001:DB8:88:i::/64     via FE80::210:7BFF:FEC2:ACC9/GigabitEthernet2/0/0, type L2  metric 20 LSP [3/7]     via FE80::210:7BFF:FEC2:ACCC/GigabitEthernet2/1/0, type L2  metric xx LSP [three/vii] * 2001:DB8:1357:i::/64     via FE80::202:7DFF:FE1A:9471/GigabitEthernet2/one/0, type L2  metric 10 LSP [4/9] * 2001:DB8:45A::/64     via FE80::210:7BFF:FEC2:ACC9/GigabitEthernet2/0/0, type L1  metric xx LSP [C/6]     via FE80::210:7BFF:FEC2:ACCC/GigabitEthernet2/1/0, type L1  metric xx LSP [C/6]     via FE80::210:7BFF:FEC2:ACC9/GigabitEthernet2/0/0, type L2  metric 20 LSP [3/7]     via FE80::210:7BFF:FEC2:ACCC/GigabitEthernet2/1/0, blazon L2  metric 20 LSP [3/seven]

            Boosted References

            Related Documents

            Related Topic

            Document Title

            IS-IS commands: complete control syntax, command mode, defaults, control history, usage guidelines, and examples

            Cisco IOS IP Routing: ISIS Control Reference

            Overview of Cisco IS-IS conceptual information with links to all the individual IS-IS modules

            "Integrated IS-IS Routing Protocol Overview"

            Standards

            Standard

            Championship

            No new or modified standards are supported, and back up for existing standards has not been modified.

            --

            RFCs

            RFC

            Title

            No new or modified RFCs are supported, and support for existing RFCs has not been modified.

            --

            Technical Assistance

            Clarification

            Link

            The Cisco Support and Documentation website provides online resources to download documentation, software, and tools. Use these resource to install and configure the software and to troubleshoot and resolve technical issues with Cisco products and technologies. Access to most tools on the Cisco Back up and Documentation website requires a Cisco.com user ID and password.

            http:/​/​www.cisco.com/​cisco/​spider web/​support/​index.html

            Characteristic Information for IPv6 Routing: IS-IS Support for IPv6

            The post-obit table provides release information nigh the feature or features described in this module. This table lists but the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.

            Employ Cisco Feature Navigator to notice information most platform back up and Cisco software prototype support. To admission Cisco Feature Navigator, get to world wide web.cisco.com/​go/​cfn. An account on Cisco.com is not required.
            Table 1 Feature Information for IPv6 Routing: IS-IS Support for IPv6

            Characteristic Proper name

            Releases

            Feature Data

            IPv6 Routing: IS-IS Back up for IPv6

            Cisco IOS XE Release ii.4

            IPv6 enhancements to IS-IS allow IS-IS to advertise IPv6 prefixes in add-on to IPv4 and OSI routes.

            The post-obit commands were introduced or modified: accost-family ipv6 (IS-IS) , adjacency-check , default-information originate (IPv6 IS-IS) , distance (IPv6) , ipv6 router isis , isis ipv6 metric , maximum-paths (IPv6) , prc-interval (IPv6) , router isis , prove clns neighbors , prove ipv6 protocols , bear witness isis database , show isis topology , spf-interval , summary-prefix (IPv6 IS-IS) .

            IPv6 ISIS Local RIB

            Cisco IOS XE Release two.vi

            A router that is running IS-IS IPv6 maintains a local RIB in which it stores all routes to destinations information technology has learned from its neighbors.

            The following command was introduced: evidence isis ipv6 rib .


            thompsongionly.blogspot.com

            Source: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_isis/configuration/xe-16/irs-xe-16-book/ip6-route-isis-xe.html

            0 Response to "what allows the is-is routing protocol to operate on ipv6 networks?"

            إرسال تعليق

            Iklan Atas Artikel

            Iklan Tengah Artikel 1

            Iklan Tengah Artikel 2

            Iklan Bawah Artikel