3Com S7906E - Switch, Configuration Manual

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To do… Use the command… Remarks
Enter system view
system-view
—
Enter BGP view bgp as-number —
globally log-peer-change
Optional
Enabled by default
Enable the
logging of
peer state
changes
for a peer or
peer group peer { group-name | ip-address }
log-change
Optional
Enabled by default
Configuring BFD for BGP
By default, the BGP keepalive interval is 60 seconds and the holdtime interval is 180 seconds. If neither
the holdtime interval nor the keepalive interval is configured as 0, the holdtime interval must be at least
three times the keepalive interval. This makes the detection of neighbors rather slow, and a large
quantity of packets will be dropped when being transmitted or received through a high-speed interface.
Therefore, BFD was introduced to solve this problem. It can quickly finds neighbors 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 —
Enter BGP view bgp as-number —
Enable BFD for the specified
BGP peer
peer ip-address bfd
Required
Not enabled by default
z
At present, you can configure BFD for IPv4 BGP neighbors only. Before configuring BFD for BGP,
you need to enable BGP.
z
If GR capability is enabled for BGP, use BFD with caution.
z
For BFD configuration, refer to BFD Configuration in the High Availability Volume .
Displaying and Maintaining BGP
Displaying BGP
To do… Use the command… Remarks
Display peer group information display bgp group [ group-name ]
Display advertised BGP routing
information
display bgp network
Display AS path information display bgp paths [ as-regular-expression ]
Available in
any view