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IPSEC with GRE Tunnels


I need to make an IPSec Nedwork with two HeadQuartes.

On HeadQuartes I put Cisco 3725 with IOS c3725-ik9o3s-mz.122-15.T7.bin.

On client side I have c1700.

I try to configure an IPSec solution with GRE tunnels and Eigrp routing.

After configuration I have established tunnels, and a good routing table in

every site.

I have connectivity from each site to other.

My problem is that from HeadQuartes Lan I don't have connectivity to

remotes sites even from ethernet-lan router C3725 I have connectivity to

each site (in routing table I have al remote sites and I check conectivity

to remote sites ethernet-lan with ping - looks like C3725 don't forwards


Any ideea?

Thanks in advance,

Valeriu Filipescu

New Member

Re: IPSEC with GRE Tunnels

Could you please post your configs and ip route on both sides to get into depth of the above problem. I have lots of sites running GRE Tunnels within IPSEC and routing EIGRP packets across them. Most of the time I have faced problems with 2 things : MTU and bandwidth parameter of the Tunnel (default bandwidth of gre tunnnel is 9 Kbit). Since you say that the tunnel is ok, need to see the configs and ip route output.

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