Bgp Route Reflector Configuration - 3Com MSR 50 Series Configuration Manual

866 C 56: BGP C
HAPTER ONFIGURATION
BGP Route Reflector
Configuration
# Apply the routing policy.
[RouterA] bgp 10
[RouterA-bgp] peer 200.1.2.2 route-policy comm_policy export
[RouterA-bgp] peer 200.1.2.2 advertise-community
# Display BGP routing table information on Router B.
[RouterB] display bgp routing-table 9.1.1.0
BGP local router ID : 2.2.2.2
Local AS number : 20
Paths: 1 available, 1 best
BGP routing table entry information of 9.1.1.0/24:
From
Original nexthop: 200.1.2.1
Community
AS-path
Origin
Attribute value : MED 0, pref-val 0, pre 255
State
Not advertised to any peers yet
You can find the configured community attribute in the above output. At this
time, the route to the destination 9.1.1.0/24 is not available in the routing table of
Router C.
Network requirements
In the following figure, all routers run BGP.
Between Router A and Router B is an EBGP connection, between Router C and
■
Router B, Router C and Router D are IBGP connections.
Router C is a route reflector with clients Router B and D.
■
Router D can learn route 1.0.0.0/8 from Router C.
■
Network diagram
Figure 250 Network diagram for BGP route reflector configuration
Eth1/0
1.1.1.1/8
S2/0
192.1.1.1 /24
Router A
S2/0
192 .1 .1.2/24
AS 100
Configuration procedure
1 Configure IP addresses for interfaces (omitted)
2 Configure BGP connections (omitted)
: 200.1.2.1 (1.1.1.1)
: No-Export
: 10
: igp
: valid, external, best,
Route
Reflector
S2/1
193 .1 .1.1/24
Router C
S2 /1
193 .1 .1.2/24
AS 200
Router B
S 2/0
194 .1.1 .1/24
S2/0
194 .1.1.2/24
Router D