I am trying DESPRATELY to get Cisco, Linux, WCCP, Squid, and ip_gre to all play nicely together. I am running RHEL 3.1 with a 2.4.21-37.EL kernel. Squid is version squid-2.5.STABLE3-6.3 I started off following the instructions on the FAQ: http://www.squid-cache.org/Doc/FAQ/FAQ-17.html#ss17.13 Since then, I have tried several different senerios and combinations of ip_gre and ip_wccp but none seem to work. In every senerio the router sees the squid box and says it is redirecting data. However, tcpdump does not show any traffic (other than the 2048 UDP control packets) and my access log is not growing. Currently I have applied Joe's patch for ip_gre but the same symptoms exist. Below I have pasted the results of my current setup. webc2:~#modprobe ip_gre webc2:~# lsmod Module Size Used by Not tainted iptable_nat 22744 1 (autoclean) ip_conntrack 29736 1 (autoclean) [iptable_nat] ip_tables 16544 3 [iptable_nat] ip_gre 11968 0 e1000 94108 2 sg 37356 0 (autoclean) microcode 6848 0 (autoclean) keybdev 2976 0 (unused) mousedev 5624 0 (unused) hid 22500 0 (unused) input 6144 0 [keybdev mousedev hid] ehci-hcd 20776 0 (unused) usb-uhci 26828 0 (unused) usbcore 81120 1 [hid ehci-hcd usb-uhci] mptscsih 42508 4 mptbase 49396 3 [mptscsih] diskdumplib 5228 0 [mptscsih mptbase] ext3 90056 3 jbd 55348 3 [ext3] sd_mod 14128 8 scsi_mod 115628 3 [sg mptscsih sd_mod] webc2:~# ifconfig gre0 127.0.0.2 webc2:~# ifconfig gre0 gre0 Link encap:UNSPEC HWaddr 00-00-00-00-FF-00-00-00-00-00-00-00-00-00-00-00 inet addr: 127.0.0.2 Mask: 255.0.0.0 UP RUNNING NOARP MTU:1476 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:54 dropped:0 overruns:0 carrier:0 collisions:54 txqueuelen:0 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b) webc2:~# lsmod Module Size Used by Not tainted iptable_nat 22744 1 (autoclean) ip_conntrack 29736 1 (autoclean) [iptable_nat] ip_tables 16544 3 [iptable_nat] ip_gre 11968 1 webc2:~# iptables -t nat -A PREROUTING -i gre0 -p tcp -m tcp --dport 80 -j DNAT --to-destination 150.125.125.114:80 webc2:~# cat /etc/squid/squid.conf --trimmed-- wccp_router 150.125.125.98 http_port 80 httpd_accel_host virtual httpd_accel_port 80 httpd_accel_with_proxy on httpd_accel_uses_host_header on The Cisco setup is pretty simple and standard. Again, if you can offer any advice I would greatly appreciate it. Thanks, -- Chad
