H3C Technologies H3C S10500 Series Switches - Manual (Page 355)

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To do… Use the command… Remarks
Enter IPv6 address family view ipv6-family —
Configure the router as a route
reflector and specify an IPv6 peer
or peer group as a client
peer { ipv6-group-name |
ipv6-address } reflect-client Required
Not configured by default.
Enable route reflection between
clients
reflect between-clients
Optional
Enabled by default.
Configure the cluster ID of the
route reflector
reflector cluster-id cluster-id
Optional
By default, a route reflector uses its
router ID as the cluster ID.
NOTE:
•
Because the route reflector forwards routing information between clients, you must make clients of a
route reflector fully meshed. If clients are fully meshed, H3C recommends disabling route reflection
between clients to reduce routing costs.
• If a cluster has multiple route reflectors, you must specify the same cluster ID for these route reflectors to
avoid routing loops.
Configuring BFD for IPv6 BGP
IPv6 BGP maintains neighbor relationships based on the keepalive timer and holdtime timer, which are
set in seconds. IPv6 BGP defines that the holdtime interval must be at least three times the keepalive
interval. This mechanism makes the detection of a link failure rather slow and thus causes a large quantity
of packets to be dropped especially when the failed link is a high-speed link. You can enable BFD to
detect the link to a peer. BFD can quickly detect any link failure and thus reduce network convergence
time.
Follow these steps to enable BFD for a BGP peer:
To do… Use the command… Remarks
Enter system view system-view —
Enable BGP and enter BGP view bgp as-number
Required
Not enabled by default
Enter IPv6 address family view ipv6-family —
Enable BFD for the specified BGP
peer
peer ipv6-address bfd
Required
Not enabled for any BGP peer by
default
NOTE:
•
Before configuring BFD for IPv6 BGP, you need to enable BGP.
• After a link failure occurs, BFD may detect the failure before the system performs GR and as a result, GR
will fail. Therefore, if GR capability is enabled for IPv6 BGP, use BFD with caution.
• For more information about BFD, see High Availability Configuration Guide.