RE: [squid-users] squid+WCCPv2+GRE

Try using an address that is not in the 127.x.x.x network for your GRE
interface. I believe they get lost between lo0 and gre0 as they are
both on the same subnet. I don't know for sure, but changing the
address made a difference for me. Make sure you pick an address that is
not used in your network at all.

Thanks,
 Bryan
 
 

-----Original Message-----
From: Dean Albano [mailto:dean.albano@121media.com]
Sent: June 9, 2006 2:25 PM
To: Shoebottom, Bryan
Cc: squid-users@squid-cache.org
Subject: Re: [squid-users] squid+WCCPv2+GRE

Ok. I took us a bit, but we are now running kernel 2.6.9-34.0.1.EL.
We seem to be having the same problem in that the GRE header is not
getting stripped off (squid is not getting the packets).

My gre tunnel is:
[root@proxy squid]# iptunnel
sit0: ipv6/ip remote any local any ttl 64 nopmtudisc
gre0: gre/ip remote any local any ttl inherit nopmtudisc
gre1: gre/ip remote 10.2.0.1 local 10.2.0.10 dev eth0 ttl inherit

During a trace, I see the packets being sent from the loopback
address of the router, but the proxy is not replying.

Also, my gre interface shows:
[root@proxy squid]# ifconfig gre1
gre1 Link encap:UNSPEC HWaddr
0A-02-00-0A-00-00-00-00-00-00-00-00-00-00-00-00
           inet addr:127.0.0.2 P-t-P:127.0.0.2 Mask:255.255.255.255
           UP POINTOPOINT RUNNING NOARP MTU:1476 Metric:1
           RX packets:0 errors:0 dropped:0 overruns:0 frame:0
           TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:0
           RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)

No packets to or from the gre interface.

Any ideas?

Thanks

Dean J. Albano
Network Integration Consultant
dean.albano@121media.com
264 W. 40th Street 16th Fl.
New York, NY 10018

tel: 646-217-0598
fax: 212 937-5237

On Jun 2, 2006, at 1:33 PM, Shoebottom, Bryan wrote:

I had a lot of problems trying to use a 2.4 kernel, try a 2.6.9 or
higher.

Thanks,
  Bryan

-----Original Message-----
From: Dean Albano [mailto:dean.albano@121media.com]
Sent: June 2, 2006 12:27 PM
To: Shoebottom, Bryan
Cc: squid-users@squid-cache.org
Subject: Re: [squid-users] squid+WCCPv2+GRE

Sorry, I should have stated that. We are using kernel 2.4.21-37.EL.
The ip_gre module is loaded.

Dean J. Albano
Network Integration Consultant
dean.albano@121media.com
264 W. 40th Street 16th Fl.
New York, NY 10018

tel: 646-217-0598
fax: 212 937-5237

On Jun 2, 2006, at 12:24 PM, Shoebottom, Bryan wrote:

Do you have the ip_gre module loaded? Are you using a 2.6.9 or newer
kernel?

Thanks,
   Bryan

-----Original Message-----
From: Dean Albano [mailto:dean.albano@121media.com]
Sent: June 2, 2006 12:14 PM
To: squid-users@squid-cache.org
Subject: [squid-users] squid+WCCPv2+GRE

We are using squid (Version 2.5.STABLE14+module1.0) with WCCP v2
compiled in to transparently redirect http. The problem seems to be
that the GRE headers are not being removed. The access log does not
show incoming requests. The tcpdump trace shows that the GRE packets
are being sent to the cache server, but no packets are flowing from
the server.

Any ideas as to what we are doing wrong?

Dean J. Albano
Network Integration Consultant
dean.albano@121media.com
Received on Fri Jun 09 2006 - 12:40:06 MDT