R2511-HP MSR Router Series MPLS Configuration Guide(V5)

135
Ste
p
Command Remarks
5. Redistribute the routes of the
local CEs.
import-route protocol [ process-id ]
[ med med-value | route-policy
route-policy-name ] *
A PE must redistribute the
routes of the local CEs into
its VPN routing table so it
can advertise them to the
peer PE.
6. Configure BGP to filter routes
to be advertised.
filter-policy { acl-number | ip-prefix
ip-prefix-name } export [ direct | isis
process-id | ospf process-id | rip
process-id | static ]
Optional.
By default, BGP does not
filter routes to be advertised.
7. Configure BGP to filter
received routes.
filter-policy { acl-number | ip-prefix
ip-prefix-name } import
Optional.
By default, BGP does not
filter received routes.
8. Allow the local AS number to
appear in the AS_PATH
attribute of a received route
and set the maximum number
of repetitions.
peer { group-name | ip-address }
allow-as-loop [ number ]
Optional.
Required for a hub-spoke
network.
BGP detects routing loops
by AS number. In a
hub-spoke network where
EBGP is running between a
PE and a CE, the routing
information the PE
advertises to a CE carries
the number of the AS where
the PE resides. Therefore,
the route updates that the PE
receives from the CE also
include the number of the
AS where the PE resides.
This causes the PE unable to
receive the route updates. In
this case, you must
configure this command to
allow routing loops.
2. Configure the CE:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter BGP view.
bgp as-number N/A
3. Configure the PE as the EBGP
peer.
peer { group-name | ip-address }
as-number as-number
For more information about
BGP peer and peer group
configuration, see Layer
3—IP Routing Configuration
Guide. This chapter does not
differentiate between peer
and peer group.