Troubleshooting - FoxGate S95 SERIES Configuration Manual

Routing Protocol Overview
the other one is AS-PATH 2 by EBGP (going through SwitchB). BGP selects the shortest
path, so AS-PATH 1 is the preferred path. If the path 2 is wished, which is through EBGP
path, we can add two extra AS path numbers into the AS-PATH messages from SwitchA
to SwitchD so as to change the determination SwitchC take to 192.68.11.0/24.
192.68.11.1
VLAN1
SwitchA
VLAN3
172.16.20.1
VLAN3
172.16.20.2
Configuration procedure: (only SwitchA is listed, configurations for other switches are
omitted.)
The configuration of Layer 3 switchA:
SwitchA#config
SwitchA(config) #router bgp 1
SwitchA(config-router)#network 192.68.11.0 mask 255.255.255.0
SwitchA(config-router)#neighbor 172.16.20.2 remote-as 3
SwitchA(config-router)#neighbor 172.16.20.2 route-map AddAsNumbers out
SwitchA(config-router)#neighbor 192.68.6.1 remote-as 2
SwitchA(config-router)#exit
SwitchA(config)#route-map AddAsNumbers permit 10
SwitchA(config-route-map)#set as-path prepend 1 1

37.2.4 Troubleshooting

Faq: The routing protocol could not achieve the routing messages study under normal
protocol running state
Troubleshooting: check following errors:
 Each node of route-map should at least has one node is permit match mode. When
the route map is used in routing messages filtering, the routing messages will be
AS1
VLAN2
192.68.6.2
AS3
SwitchD
VLAN2
172.16.1.1 172.16.1.2
Fig 37-1 Policy routing Configuration
320
AS2
VLAN3
192.68.10.1
VLAN2
SwitchB
192.68.6.1
192.68.5.2
VLAN1
192.68.5.1
SwitchC
VLAN2
VLAN1