Configuration Prerequisites; Configuring Ipv6 Bgp Timers - HP 3600 v2 series Configuration Manual

After establishing an IPv6 BGP connection, two routers send keepalive messages periodically to each
other to maintain the connection. If a router receives no keepalive message from the peer after the
holdtime elapses, it tears down the connection.
When establishing an IPv6 BGP connection, the two parties compare their holdtimes, taking the shorter
one as the common holdtime. If the holdtime is 0, neither keepalive massage is sent, nor holdtime is
checked.
IPv6 BGP connection soft reset
•
After modifying a route selection policy, you must reset IPv6 BGP connections to make the new one take
effect. The current IPv6 BGP implementation supports the route-refresh feature that enables dynamic route
refresh without needing to disconnect IPv6 BGP links.
After this feature is enabled on all IPv6 BGP routers, a router that wants to apply a new route selection
policy advertises a route-refresh message to its peers, which then send their routing information to the
router. After receiving the routing information, the router can perform dynamic route update by using the
new policy without tearing down connections.
If a peer not supporting route-refresh exists in the network, you must configure the peer keep-all-routes
command to save all routes from the peer. When the routing policy is changed, the system will update the
IPv6 BGP routing table and apply the new policy.

Configuration prerequisites

Before configuring IPv6 BGP timers, complete the following tasks:
Enable IPv6
•
• Configure IPv6 BGP basic functions

Configuring IPv6 BGP timers

Follow these steps to configure IPv6 BGP timers:
To do...
Enter system view
Enter BGP view
Enter IPv6 address family view
Configure
IPv6 BGP
timers
Configure the interval for sending the
same update to an IPv6 peer or peer
group
Specify keepalive
interval and holdtime
Configure keepalive
interval and holdtime for
an IPv6 peer or peer
group
Use the command...
system-view
bgp as-number
ipv6-family
timer keepalive keepalive hold
holdtime
peer { ipv6-group-name |
ipv6-address } timer keepalive
keepalive hold holdtime
peer { ipv6-group-name |
ipv6-address }
route-update-interval interval
338
Remarks
—
—
—
Optional
The keepalive interval defaults to
60 seconds, holdtime defaults to
180 seconds.
Optional
The interval for sending the same
update to an iBGP peer or an
eBGP peer defaults to 15
seconds or 30 seconds.