1266 CHAPTER 82: IPV6 BGP CONFIGURATION COMMANDS

Description Use the synchronization command to enable the synchronization between IPv6 BGP and IGP.

Use the undo synchronization command to disable the synchronization.

The feature is disabled by default.

With this feature enabled and when a non-BGP router is responsible for forwarding packets in an AS, IPv6 BGP speakers in the AS cannot advertise routing information to other ASs unless all routers in the AS know the latest routing information.

By default, upon receiving an IPv6 IBGP route, the BGP router only checks whether the next hop is reachable before advertisement. If synchronization is enabled, the IBGP route can be advertised to EBGP peers only when the route is also advertised by the IGP.

Examples # Enable the route synchronization between IPv6 BGP and IGP.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] ipv6-family

[Sysname-bgp-af-ipv6] synchronization

timer (IPv6 address family view)

Syntax timer keepalive keepalive hold holdtime

undo timer

View IPv6 address family view

Parameters keepalive: Keepalive interval in seconds, ranging from 1 to 21845.

holdtime: Holdtime interval in seconds, ranging from 3 to 65535.

Description Use the timer command to specify IPv6 BGP keepalive interval and holdtime interval.

Use the undo timer command to restore the default.

By default, the keepalive and holdtime intervals are 60s and 180s respectively.

Note that:

Timer configured using the peer timer command is preferred to the timer configured using the timer command.

The holdtime interval must be at least three times the keepalive interval.

The configured timer applies to all the IPv6 BGP peers. It becomes valid only after the corresponding IPv6 BGP connections are reset.

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3Com MSR 30, MSR 50 manual Timer IPv6 address family view, Syntax timer keepalive keepalive hold holdtime Undo timer