Hi, I am experiencing the following problem: Squid does not get any I_SEE_YOU messages and the router prints out "Here_I_Am packet from 192.168.3.20 w/bad rcv_id 0000000" Here is the setup and what is happening in more detail: SQUID BOX ======== IP: 192.168.3.20 Squid 2.6STABLE9, kernel 2.4.32 or 2.6.16, for now the kernel version does not seem to matter. For now I use one squid and one router. But once I get this to work, I plan on using 2 routers and most likely a second squid. Thus the dynamic configuration. squid.conf wccp2 settings: wccp2_router 192.168.3.21 wccp2_forwarding_method 1 wccp2_return_method 1 wccp2_assignment_method 1 wccp2_service dynamic 97 password=exPAS12 wccp2_service_info 97 protocol=tcp flags=src_ip_hash,ports_source priority=240 ports=80 wccp2_weight 10000 CISCO 2621 ======== Cisco Internetwork Operating System Software IOS (tm) C2600 Software (C2600-I-M), Version 12.0(3)T3, RELEASE SOFTWARE (fc1) Copyright (c) 1986-1999 by cisco Systems, Inc. Compiled Thu 15-Apr-99 15:41 by kpma Image text-base: 0x80008088, data-base: 0x80693A88 ROM: System Bootstrap, Version 11.3(2)XA4, RELEASE SOFTWARE (fc1) part of 'show conf': ip wccp 97 password exPAS12 ip name-server 192.168.1.253 ip name-server 192.168.1.252 ! interface FastEthernet0/0 ip address 192.168.3.21 255.255.255.0 no ip directed-broadcast ip wccp 97 redirect out no ip mroute-cache STARTING SQUID ============ If I start squid I get the following output on the CISCO: 23:30:08: WCCP-EVNT:D97: Web Cache 192.168.3.20 added 23:30:18: WCCP-EVNT:D97: Built new router view: 1 routers, 1 usable web caches, change # 00000030 if I restart squid I get the following on CISCO: 23:31:03: WCCP-EVNT:D97: Here_I_Am packet from 192.168.3.20 w/bad rcv_id 0000000 eventually, I get this: 23:50:06: WCCP-EVNT:D97: Redirect_Assignment packet from 192.168.3.20 fails source check I do not get any I_SEE_YOU messages in squid's cache.log The only wccp2 related messages are : 2007/02/08 11:14:22| WCCP Disabled. 2007/02/08 11:14:22| Accepting WCCPv2 messages on port 2048, FD 48. 2007/02/08 11:14:22| Initialising all WCCPv2 lists TCPDUMP ====== in order to be sure that udp packets are coming through, I captured the traffic while starting squid # tcpdump -X -s 1600 -n -i any -p port 2048 & # squid 11:16:13.481972 IP 192.168.3.20.2048 > 192.168.3.21.2048: UDP, length 160 0x0000: 4500 00bc f920 0000 4011 f996 c0a8 0314 E.......@....... 0x0010: c0a8 0315 0800 0800 00a8 ceb5 0000 000a ................ 0x0020: 0200 0098 0000 0014 0000 0001 67ae 4954 ............g.IT 0x0030: 3716 c97d e9fa fcf5 973d c4e6 0001 0018 7..}.....=...... 0x0040: 0161 f006 0000 0031 0050 0000 0000 0000 .a.....1.P...... 0x0050: 0000 0000 0000 0000 0003 002c c0a8 0314 ...........,.... 0x0060: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 0x0070: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 0x0080: 0000 0000 2710 0000 0005 0014 0000 0001 ....'........... 0x0090: 0000 0001 c0a8 0315 0000 0000 0000 0000 ................ 0x00a0: 0008 0018 0001 0004 0000 0001 0002 0004 ................ 0x00b0: 0000 0001 0003 0004 0000 0001 ............ 11:16:13.493933 IP 192.168.3.21.2048 > 192.168.3.20.2048: UDP, length 156 0x0000: 4500 00b8 1cba 0000 ff11 1701 c0a8 0315 E............... 0x0010: c0a8 0314 0800 0800 00a4 7651 0000 000b ..........vQ.... 0x0020: 0200 0094 0000 0014 0000 0001 8fb9 abcb ................ 0x0030: fa5b 24d3 1dc9 57f3 a8b1 a8bb 0001 0018 .[$...W......... 0x0040: 0161 f006 0000 0031 0050 0000 0000 0000 .a.....1.P...... 0x0050: 0000 0000 0000 0000 0002 0014 c0a8 0315 ................ 0x0060: 0000 1c35 c0a8 0315 0000 0001 c0a8 0314 ...5............ 0x0070: 0004 0044 0000 0030 c0a8 0314 0000 0001 ...D...0........ 0x0080: 0000 0001 c0a8 0315 0000 0001 c0a8 0314 ................ 0x0090: 0000 0000 ffff ffff ffff ffff ffff ffff ................ 0x00a0: ffff ffff ffff ffff ffff ffff ffff ffff ................ 0x00b0: ffff ffff 2710 0000 ....'... 11:16:18.543117 IP 192.168.3.21.2048 > 192.168.3.20.2048: UDP, length 80 0x0000: 4500 006c 1cbb 0000 ff11 174c c0a8 0315 E..l.......L.... 0x0010: c0a8 0314 0800 0800 0058 1e0a 0000 000d .........X...... 0x0020: 0200 0048 0000 0014 0000 0001 f7b9 dfbe ...H............ 0x0030: 51e7 c37e f30e bbb7 623e efe4 0001 0018 Q..~....b>...... 0x0040: 0161 f006 0000 0031 0050 0000 0000 0000 .a.....1.P...... 0x0050: 0000 0000 0000 0000 0007 0010 c0a8 0315 ................ 0x0060: 0000 1c36 c0a8 0315 c0a8 0314 ...6........ 11:16:23.485739 IP 192.168.3.20.2048 > 192.168.3.21.2048: UDP, length 160 0x0000: 4500 00bc f921 0000 4011 f995 c0a8 0314 E....!..@....... 0x0010: c0a8 0315 0800 0800 00a8 6976 0000 000a ..........iv.... 0x0020: 0200 0098 0000 0014 0000 0001 1c32 0c8e .............2.. 0x0030: d72a 3ab8 5bc7 3976 3432 39a3 0001 0018 .*:.[.9v429..... 0x0040: 0161 f006 0000 0031 0050 0000 0000 0000 .a.....1.P...... 0x0050: 0000 0000 0000 0000 0003 002c c0a8 0314 ...........,.... 0x0060: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 0x0070: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 0x0080: 0000 0000 2710 0000 0005 0014 0000 0001 ....'........... 0x0090: 0000 0001 c0a8 0315 0000 1c35 0000 0000 ...........5.... 0x00a0: 0008 0018 0001 0004 0000 0001 0002 0004 ................ 0x00b0: 0000 0001 0003 0004 0000 0001 if I view this (tcpdump -w dump -X -s 1600 -n -i any -p port 2048) in ethereal, I can see that "Here I am" and "I see you" messages are sent back and forth. I can email you the dump, the mailing list does not permit attachments. What did I do wrong or miss? Any pointers are more than appreciated. Thank you! Regards, Martin