Disabling Bgp Route Advertisement To A Peer Or Peer Group; Configuring Bgp Soft-Reset - HPE FlexNetwork HSR6800 Configuration Manual

Disabling BGP route advertisement to a peer or peer group

To disable BGP from sending routing updates to the specified peer or peer group:
Step
Enter system view.
1.
Enter BGP view.
2.
Disable BGP from sending
3.
routing updates to the
specified peer or peer group.
IMPORTANT:
The previous configuration does not apply to the default route sent by the peer
default-route-advertise command.

Configuring BGP soft-reset

After modifying the route selection policy, you must reset BGP sessions to make the new policy take
effect and advertise new routes. The router then filters routing information by using the new policy.
The soft-reset feature allows you to refresh the BGP routing table and apply the new route selection
policy without tearing down BGP sessions.
The following soft-reset methods are available:
•
Automatic soft-reset—After a policy is modified, the router advertises a Route-refresh
message to the peers, which then resend their routing information to the router. After receiving
the routing information, the router filters the routing information by using the new policy.
This method requires that both the local router and the peer support route refresh.
•
Manual soft-reset—Use the peer keep-all-routes command to save all route updates from
the peer. After modifying the route selection policy, use the refresh bgp command to filter
routing information by using the new policy.
This method uses more memory resources to save routes and does not require that the local
router and the peer support route refresh.
Configuring automatic soft-reset
After route refresh is enabled for peers and a policy is modified, the router advertises a route-refresh
message to the peers, which then resend their routing information to the router. After receiving the
routing information, the router performs dynamic route update by using the new policy.
To enable BGP route refresh for a peer or peer group:
Step
Enter system view.
1.
Enter BGP view or
2.
BGP-VPN instance view.
Command
system-view
bgp as-number
peer { group-name | ip-address }
update-no-advertise
Command
system-view
•
Enter BGP view:
bgp as-number
•
Enter BGP-VPN instance
view:
a. bgp as-number
b. ipv4-family
vpn-instance
vpn-instance-name
225
Remarks
N/A
N/A
By default, BGP sends routing
updates to peers.
Remarks
N/A
Use either method.