R3303-HP 6600/HSR6600 Routers Layer 3 - IP Routing Configuration Guide

234
IMPORTANT:
• The peer ttl-security hops command and the peer ebgp-max-hop command are mutually exclusive.
• You must configure GTSM on both the local and peer devices, and you can specify different hop-coun
t
values in a valid range for them.
To configure GTSM for BGP:
Step Command Remarks
1. Enter system view.
system-view N/A
2. Enter BGP view or BGP-VPN
instance view.
• Enter BGP view:
bgp as-number
• Enter BGP-VPN instance view:
a. bgp as-number
b. ipv4-family vpn-instance
vpn-instance-name
Use either method.
3. Configure GTSM to check
BGP packets from the
specified BGP peer or peer
group.
peer { group-name | ip-address }
ttl-security hops hop-count
Not configured by default.
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 Command Remarks
1. Enter system view.
system-view N/A
2. Enter BGP view.
bgp as-number
N/A
3. Disable BGP from sending
routing updates to the
specified peer or peer group.
peer { group-name | ip-address }
update-no-advertise
By default, BGP sends routing
updates to peers.
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