Link to home
Start Free TrialLog in
Avatar of leblanc
leblanc

asked on

BGP without default route

I have a scenario below and my question is why do I need the default route site1 and site2 router so that they can ping each other. Without the default route, I can see network 172.31.1.0/24 via 10.10.10.1 from router site2. But why I cannot ping 172.31.1.1.

User generated image
SOLUTION
Avatar of giltjr
giltjr
Flag of United States of America image

Link to home
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
Start Free Trial
SOLUTION
Link to home
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
Start Free Trial
Avatar of leblanc
leblanc

ASKER

"What do you mean you can "see 172.31.1.0/24 via 10.10.10.1"?" The sh ip ro from site2 router shows that there is a route to 172.31.1.0 via 10,10,10,1. But I cannot ping 172.31.1.1.

site2 router (without the default gateway):
site2#sh ip ro
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

     172.31.0.0/24 is subnetted, 1 subnets
B       172.31.1.0 [20/0] via 10.10.10.1, 00:00:52
     10.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C       10.10.10.0/30 is directly connected, FastEthernet1/0
C       10.10.255.2/32 is directly connected, Loopback0
C    192.168.1.0/24 is directly connected, FastEthernet0/0

The lan routers are actually switches. But I did not turned them on yet.
ASKER CERTIFIED SOLUTION
Link to home
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
Start Free Trial