GRE Tunnel configuration over MPLS

[prasaddesai.in]

HI,

I am configuring GRE tunnel between two PE's but tunnel is not coming up please advice how to proceed,

Configuration of PE1;

3845]

interface Tunnel100

ip vrf forwarding DCN-NEC

ip address 10.1.1.1 255.255.255.252

tunnel source 192.168.104.250

tunnel destination 199.168.99.253

ip route vrf DCN-NEC 199.168.99.253 255.255.255.255 91.8.4.5

Configuration on PE2:

mls mpls tunnel-recir

interface Tunnel100

ip vrf forwarding DCN-NEC

ip address 10.1.1.2 255.255.255.252

tunnel source 199.168.99.253

tunnel destination 192.168.104.250

ip route vrf DCN-NEC 192.168.104.250 255.255.255.255 91.8.5.129

Regards,

Prasad Desai

Datacraft India Ltd.

[swaroop.potdar]

Hi Martin, the MPLS and the DCN-NEC both belong to the same customer.

DCN-NEC is to manage their transmission equipments from NEC/Alcatel/Marconi and the likes. And connecting it inband through the MPLS network. Their DCN (data communication network) is consiting of legacy and hybrid elements some understanding only OSI and some both.

When I had worked with this customer I had vetted this quite some time before. Its now may be getting implemented.

Hence the need to run ISIS, and no OSPF.

Cheers,

Swaroop

[mheusing]

OK, I see, now I understand the issue.

But can you forward CLNS packets through a VRF interface? And even if, which routing protocoll do you use for PE-CE routing? There is only IPv4 or IPv6 supported, afaik.

So the main question is for me now as you already asked: Don?t they need CE to CE GRE tunnels? In case this is required, then the MPLS VPN setup is pretty simple following standard designs. You only need Tunnel endpoint routes. Actually and PE-CE IPv4 routing protocol will do from a connectivity perpective.

Correct me, if I am wrong.

Regards, Martin

[swaroop.potdar]

Yes thats what i knew of the objectives a while before. And it can be done only with CE-CE GRE tunnels if inband or ATOM.

But the post here is a little deviated from the original objective, hence my emphasis on the current/new objective of post rather than a solution.

Cheers,

Swaroop

[shivlu jain]

hi prasad

i think u are mentioning wrong in the above.Becasue pe - pe we usually use pseudowire ,i think it should be pe to ce.

PE :----

interface Tunnel100

description ### MPLS HALDWANI ###

ip vrf forwarding AMAR

ip address 172.31.236.69 255.255.255.252

tunnel source 71.5.254.230

tunnel destination 71.26.11.26

end

ip route vrf AMAR 10.59.20.0 255.255.255.0 Tunnel100 name amarujala_haldwani

CE:->>

in ce only gre is used and the default route should be towards PE.

shivlu