RE: GRE traffic via IPSEC SA (Cisco still hasn't fixed this?)

From: Jason Graun (jgraun@comcast.net)
Date: Mon Mar 01 2004 - 04:27:32 GMT-3


This isnt a bug it is by design.

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Michael Snyder
Sent: Saturday, February 28, 2004 8:48 PM
To: ccielab@groupstudy.com
Subject: GRE traffic via IPSEC SA (Cisco still hasn't fixed this?)

I remember doing this on IOS 12.0

They still haven't fixed it?

R1
Crypto Map "bb3" 10 ipsec-isakmp
        Peer = 136.10.9.9
        Extended IP access list 101
            access-list 101 permit gre any any
        Current peer: 136.10.9.9
        Security association lifetime: 4608000 kilobytes/1000 seconds
        PFS (Y/N): Y
        DH group: group2
        Transform sets={ michael, }
        Interfaces using crypto map bb3:
                Serial0
                Tunnel0

R9
Crypto Map "bb1" 10 ipsec-isakmp
        Peer = 136.10.1.1
        Extended IP access list 101
            access-list 101 permit gre any any
        Current peer: 136.10.1.1
        Security association lifetime: 4608000 kilobytes/1000 seconds
        PFS (Y/N): Y
        DH group: group2
        Transform sets={ michael, }
        Interfaces using crypto map bb1:
                Serial0
                Tunnel0

R1#st s0
Building configuration...

Current configuration : 199 bytes
!
interface Serial0
 ip address 136.10.12.1 255.255.255.0
 ip pim sparse-dense-mode
 no fair-queue
 service-module 56k clock source internal
 service-module 56k network-type dds
 crypto map bb3
end

R1#st tu0
Building configuration...

Current configuration : 139 bytes
!
interface Tunnel0
 ip address 192.168.100.2 255.255.255.252
 tunnel source Loopback0
 tunnel destination 136.10.9.9
 crypto map bb3
end

R1#
 

I had to apply a crypto map that only encrypts GRE traffic inside my
tunnel interface, to get my gre tunnel working!

Com`on if that`s not circle logic, I don`t know what would be.



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