Step 1 |
enable
Example:
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Enables privileged EXEC mode.
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Step 2 |
configure
terminal
Example:
Device# configure terminal
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Enters global configuration mode.
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Step 3 |
router
bgp
autonomous-system-number
Example:
Device(config)# router bgp 65000
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Enters router configuration mode for the specified routing process.
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Step 4 |
neighbor
{ip-address |
ipv6-address[%] |
peer-group-name}
remote-as
autonomous-system-number [alternate-as
autonomous-system-number ...]
Example:
Device(config-router)# neighbor FE80::1234:BFF:FE0E:A471% remote-as 64600
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Adds the link-local IPv6 address of the neighbor in the specified remote autonomous system to the IPv6 multiprotocol BGP neighbor table of the local router.
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Step 5 |
neighbor
{ip-address |
ipv6-address[%] |
peer-group-name}
update-source
interface-type
interface-number
Example:
Device(config-router)# neighbor FE80::1234:BFF:FE0E:A471% update-source gigabitethernet0/0/0
|
Specifies the link-local address over which the peering is to occur.
The optional
% keyword is the IPv6 link-local address identifier. This keyword needs to be added whenever a link-local IPv6 address is used outside the context of its interface.
If there are multiple connections to the neighbor and you do not specify the neighbor interface by using the
interface-type and
interface-numberarguments in the
neighbor
update-source command, a TCP connection cannot be established with the neighbor using link-local addresses.
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Step 6 |
address-family
ipv6
[vrf
vrf-name] [unicast |
multicast |
vpnv6
Example:
Device(config-router)# address-family ipv6
|
Specifies the IPv6 address family, and enters address family configuration mode.
The
unicast keyword specifies the IPv6 unicast address family. By default, the router is placed in configuration mode for the IPv6 unicast address family if the
unicast keyword is not specified with the
address-family
ipv6 command.
The
multicast keyword specifies IPv6 multicast address prefixes.
|
Step 7 |
neighbor
{ip-address |
peer-group-name |
ipv6-address
%}
activate
Example:
Device(config-router-af)# neighbor FE80::1234:BFF:FE0E:A471% activate
|
Enables the neighbor to exchange prefixes for the IPv6 address family with the local router using the specified link-local addresses.
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Step 8 |
neighbor
{ip-address |
peer-group-name |
ipv6-address[%]}
route-map
map-name {in |
out
Example:
Device(config-router-af)# neighbor FE80::1234:BFF:FE0E:A471% route-map nh6 out
|
Applies a route map to incoming or outgoing routes.
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Step 9 |
exit
Example:
Device(config-router-af)# exit
|
Exits address family configuration mode, and returns the device to router configuration mode.
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Step 10 | Repeat Step 9.
Example:
Device(config-router)# exit
|
Exits router configuration mode, and returns the device to global configuration mode.
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Step 11 |
route-map
map-tag
[permit |
deny] [sequence-number]
Example:
Device(config)# route-map nh6 permit 10
|
Defines a route map and enters route-map configuration mode.
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Step 12 |
match
ipv6
address
{prefix-list
prefix-list-name |
access-list-name
Example:
Device(config-route-map)# match ipv6 address prefix-list cisco
|
Distributes any routes that have a destination IPv6 network number address permitted by a prefix list, or performs policy routing on packets.
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Step 13 |
set
ipv6
next-hop
ipv6-address
[link-local-address] [peer-address
Example:
Device(config-route-map)# set ipv6 next-hop 2001:DB8::1
|
Overrides the next hop advertised to the peer for IPv6 packets that pass a match clause of a route map for policy routing.
The
ipv6-address argument specifies the IPv6 global address of the next hop. It need not be an adjacent router.
The
link-local-addressargument specifies the IPv6 link-local address of the next hop. It must be an adjacent router.
Note
| The route map sets the IPv6 next-hop addresses (global and link-local) in BGP updates. If the route map is not configured, the next-hop address in the BGP updates defaults to the unspecified IPv6 address (::), which is rejected by the peer. If you specify only the global IPv6 next-hop address (the
ipv6-address argument) with the
set
ipv6
next-hopcommand after specifying the neighbor interface (the
interface-type argument) with the
neighbor
update-source command in Step 5, the link-local address of the interface specified with the
interface-type argument is included as the next-hop in the BGP updates. Therefore, only one route map that sets the global IPv6 next-hop address in BGP updates is required for multiple BGP peers that use link-local addresses.
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