Enabling Bgp And Igp Route Synchronization; Configuring Bgp Route Dampening; Configuring Bgp Routing Attributes; Prerequisites - 3Com MSR 50 Series Configuration Manual

846 C 56: BGP C
HAPTER
Enabling BGP and IGP
Route Synchronization
Configuring BGP Route
Dampening
Configuring BGP
Routing Attributes

Prerequisites

Configuration Procedure

ONFIGURATION
c
CAUTION:
Only routes permitted by the specified filter policy can be added into the local
■
BGP routing table.
Members of a peer group can have different inbound route filter policies from
■
the peer group.
By default, when a BGP router receives an IBGP route, it only checks the
reachability of the route's next hop before advertisement. With BGP and IGP
synchronization configured, the BGP router cannot advertise the route to EBGP
peers unless the route is also available in the IGP routing table.
To configure BGP and IGP synchronization, use the following commands:
To do...
Enter system view
Enter BGP view
Enable synchronization
between BGP and IGP
Through configuring BGP route dampening, you can suppress unstable routes to
neither add them to the local routing table nor advertise them to BGP peers.
To configure BGP route dampening, use the following commands:
To do...
Enter system view
Enter BGP view
Configure BGP route
dampening
n
Using this command dampens only routes from EBGP peers rather than IBGP
peers.
Before configuring this task, you have configured BGP basic functions.
You can use BGP route attributes to adjust BGP route selection policy.
To configure BGP route attributes, use the following commands:
To do...
Enter system view
Use the command...
system-view
bgp as-number
synchronization
Use the command...
system-view
bgp as-number
dampening [ half-life-reachable
half-life-unreachable reuse suppress
ceiling | route-policy
route-policy-name ] *
Use the command...
system-view
Remarks
-
-
Required
Not enabled by default
Remarks
-
-
Optional
Not configured by
default
Remarks
-