473
Cost: 1 Preference: 10
IpPre: N/A QosLocalID: N/A
Tag: 0 State: Active Adv
OrigTblID: 0x0 OrigVrf: default-vrf
TableID: 0xa OrigAs: 0
NibID: 0x23000006 LastAs: 0
AttrID: 0xffffffff Neighbor: ::
Flags: 0x10041 OrigNextHop: FE80::34CC:E8FF:FE5B:C02
Label: NULL RealNextHop: FE80::34CC:E8FF:FE5B:C02
BkLabel: NULL BkNextHop: FE80::7685:45FF:FEAD:102
Tunnel ID: Invalid Interface: Vlan-interface200
BkTunnel ID: Invalid BkInterface: Vlan-interface101
FtnIndex: 0x0 TrafficIndex: N/A
Connector: N/A
Configuring IPv6 IS-IS
Overview
IPv6 IS-IS supports all IPv4 IS-IS features except that it advertises IPv6 routing information. This
chapter describes only IPv6 IS-IS specific configuration tasks. For information about IS-IS, see
"Configuring IS-IS."
Intermediate System-to-Intermediate System (IS-IS) supports multiple network protocols, including
IPv6. To support IPv6, the IETF added two type-length-values (TLVs) and a new network layer
protocol identifier (NLPID).
The TLVs are as follows:
IPv6 Reachability—Contains routing prefix and metric information to describe network
reachability and has a type value of 236 (0xEC).
IPv6 Interface Address—Same as the "IP Interface Address" TLV in IPv4 ISIS, except that the
32-bit IPv4 address is translated to the 128-bit IPv6 address.
The new NLPID is an 8-bit field that identifies which network layer protocol is supported. For IPv6,
the NLPID is 142 (0x8E), which must be carried in hello packets sent by IPv6 IS-IS.
Configuring basic IPv6 IS-IS
Before you configure basic IPv6 IS-IS, complete the following tasks:
Configure IPv6 addresses for interfaces to ensure IPv6 connectivity between neighboring
nodes.
Enable IS-IS.
Basic IPv6 IS-IS configuration can implement the interconnection of IPv6 networks.
To configure basic IPv6 IS-IS:
1. Enter system view.
N/A
2. Enable an IS-IS process and
enter IS-IS view.
isis
[ process-id ] [
vpn-instance
vpn-instance-name ]
By default, no IS-IS process is
enabled.
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