H3C S3610-28P Operation Manual page 636

Operation Manual – IPv6 Routing
H3C S3610&S5510 Series Ethernet Switches
5.5.2 Configuring IPv6 BGP Preference and Default LOCAL_PREF and
NEXT_HOP Attributes
Follow these steps to perform this configuration:
Enter system view
Enter BGP view
Enter IPv6 address family
view
Configure preference
values for IPv6 BGP
external, internal, local
routes
Configure the default
value for local preference
Advertise routes to a
peer/peer group with the
local router as the next
hop
Note:
To make sure an IBGP peer can find the correct next hop, you can configure routes
advertised to the peer to use the local router as the next hop. If BGP load balancing
is configured, the local router specifies itself as the next hop of outbound routes to a
peer/peer group regardless of whether the peer next-hop-local command is
configured.
In a "third party next hop" network, that is, the two EBGP peers reside in a common
broadcast subnet, the router does not specify itself as the next hop for routes to the
EBGP peer by default, unless the peer next-hop-local command is configured.
To do...
system-view
bgp as-number
ipv6-family
preference
{ external-preference
internal-preference
local-preference |
route-policy
route-policy-name }
default local-preference
value
peer { ipv6-group-name |
ipv6-address }
next-hop-local
Use the command...
5-13
Chapter 5 IPv6 BGP Configuration
Remarks
—
Required
—
Optional
The default preference
values of external, internal
and local routes are 255,
255, 130 respectively
Optional
The value defaults to 100
Required
By default, the feature is
available for routes
advertised to the EBGP
peer/peer group, but not
available to the IBGP
peer/peer group