05-03-2010 08:34 AM - edited 03-04-2019 08:21 AM
Hello people,
im facing problem trying to establish a GRE tunnel over mpls. The topology goes as follows:
(server) ----CE1(6500)-----PE1(6500)----vrf cloud-----CE2(6500)--FW
-server needs to establish a gre tunnel with FW.
-server receives a default route from CE1 via OSPF.
-CE1 has an default static route pointing to the next hop which is an interface VLAN (in a vrf) on PE1.
- PE1 receives a default route generated by CE2 (via mpbgp).
In this situation the GRE tunnel wouldnt come up.The only way i got the GRE to work was replacing the default static route on CE1 with a more specific static route.
On both cases (default AND specific static routes) the connectivity(ping) from end to end was there.
Has anybody seen anything alike?
thanks,
Bruno
05-03-2010 09:48 AM
I have observed tunnel flapping issue due to recursive routing. Do you observe the same?
Regards,
Bhavesh
05-03-2010 10:13 AM
That was my first guess, but no, the GRE tunnel doesnt come up when I have default static route configurated and no messages in the log.
Regards,
Bruno
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