IPv6 autoconf oddity... (2.4.21/2.4.22 kernels)
From: Matti Aarnio <hidden>
Date: 2003-11-15 21:11:04
I have two nearly identical machines at two locations. Or maybe not quite identical.. very nearly anyway. Machine running somewhat modified RedHat Rawhide 2.4.21-20.1.2024.2.1.nptlmea receives RAs from a cisco router, and autoconfigures nicely. Machine running RedHat Rawhide Fedora 2.4.22-1.2115.nptlsmp kernel fails to autoconf. That machine is receives RAs from a NetBSD router's rtadvd. Both machines run without any specific things to particularly enable IPv6 in their configurations. Besides of auto-loading the ipv6 module. Oddly the functioning pair isn't configured with EUI64=y setting, but the failing one is. Yet the cisco is configured to send EUI64 RAs... Any ideas ? /Matti Aarnio Cisco router advertisement: 21:28:24.008112 fe80::2b0:c2ff:fe89:c352 > ff02::1: icmp6: router advertisement(chlim=64, pref=medium, router_ltime=1800, reachable_time=0, retrans_time=0)(src lladdr: 00:b0:c2:89:c3:52) (prefix info: LA valid_ltime=2592000,preferred_ltime=604800, prefix=2001:14b8:0:3001::/64) [class 0x70] (len 56, hlim 255) 0x0000 6700 0000 0038 3aff fe80 0000 0000 0000 g....8:......... 0x0010 02b0 c2ff fe89 c352 ff02 0000 0000 0000 .......R........ 0x0020 0000 0000 0000 0001 8600 b5b6 4000 0708 ............@... 0x0030 0000 0000 0000 0000 0101 00b0 c289 c352 ...............R 0x0040 0304 40c0 0027 8d00 0009 3a80 0000 0000 ..@..'....:..... 0x0050 2001 14b8 0000 3001 0000 0000 0000 0000 ......0......... NetBSD rtadvd advertisemenent: # 21:18:42.468714 fe80::200:e2ff:fe70:341f > all-nodes-mc: icmp6: router advertisement(chlim=64, pref=medium, router_ltime=90, reachable_time=0, retrans_time=0)(src lladdr: 00:00:e2:70:34:1f) (prefix info: LA valid_ltime=2592000,preferred_ltime=604800, prefix=2001:14b8:0:3003::/64) (len 56, hlim 255) 0x0000 6000 0000 0038 3aff fe80 0000 0000 0000 `....8:......... 0x0010 0200 e2ff fe70 341f ff02 0000 0000 0000 .....p4......... 0x0020 0000 0000 0000 0001 8600 9c5b 4000 005a ...........[@..Z 0x0030 0000 0000 0000 0000 0101 0000 e270 341f .............p4. 0x0040 0304 40c0 0027 8d00 0009 3a80 0000 0000 ..@..'....:..... 0x0050 2001 14b8 0000 3003 0000 0000 0000 0000 ......0.........