routing over BGP networks

[smithcolm]

Hi,

I have 3 sites each with cisco routers connected to our ISP BGP network.

site A is connected to site B and Site C over BGP

so A can see B and C but B cannot see C (and vice versa)

I have tried adding in

redistribute static

and

redistribute connected

if i add a static route   ip router B.B.B.B 255.255.255.0 A.A.A.A  (and the same for C)

i get a time out from the BGP neighbor (the ISP gateway)

how can i get Site B and C talking to eachother,

is this somethig that my ISP needs to sort?

Thanks

[rizwanr74]

Hi Colm,

Please try this.

on B router:

neighbor c.c.c.c ebgp-multihop 3

on C router:

neighbor b.b.b.b ebgp-multihop 3

Thanks

[smithcolm]

when i try that i get this

% Specify remote-as or peer-group commands first

[Praveen AR]

Hi Colm Smith,

Can you make your query little bit clear.Does it mean you have no reachability to  B   ip address from  C and  vice versa.

.

[smithcolm]

yes B cannot see C, and C cannot C B.

but noth B and C can see A and A can see B and C.

I am told by my ISP that they are "spokes" on the bgp network.

we might be going Mesh whcih would resolve this for me, but it would be nice if i could at least get this working until we go Mesh.

[Praveen AR · Accepted solution]

Hi Colm,

Spoke to spoke communication you need  wait till they fISP full  mesh.May I know your exact requirements for spoke to spoke  bgp conectivity.

[smithcolm]

hoping we get MESH setup soon so.

we need need the site to site access for

Exchange

Citrix

Active Directory (AD not too urgent because we can replicate through site A)

file and print etc

[smithcolm]

fyi

seems to have been an ISP issue.

MESH network setup and working

routing working directly between sites.

cheers for input