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@xxxxxxxxxxxx] Sent: June 9, 2006 2:25 PM To: Shoebottom, Bryan Cc: squid-users@xxxxxxxxxxxxxxx Subject: Re: 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@xxxxxxxxxxxx 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@xxxxxxxxxxxx] Sent: June 2, 2006 12:27 PM To: Shoebottom, Bryan Cc: squid-users@xxxxxxxxxxxxxxx Subject: Re: 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@xxxxxxxxxxxx 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@xxxxxxxxxxxx] Sent: June 2, 2006 12:14 PM To: squid-users@xxxxxxxxxxxxxxx Subject: 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@xxxxxxxxxxxx
