Gert Doering wrote: > Hi, > > On Mon, Sep 10, 2007 at 08:55:35PM +0200, Gerald Krause wrote: >> The only problem with our config could be the fact that we have >> configured a MTU of 1530 byte (because of MPLS) on the FEs. But even >> if this could be problematic I would expect that in the case that a >> paket arrive which can't be delivered through the VirtualInterfaces >> (MTU 1448 byte) the system have to mention that in the logging buffer. >> Thats why I have enabled ICMP debugging and related CEF debugging >> but I never see 'packet-too-big' ICMP messages, only 'echo' and >> 'host/port unreachable' messages are logged. But I See that CEF is >> aware of the fact that it can't deliver the packet without >> fragmentation: > > I've seen massive problems with IPv6 MTU and CEF on a 7301 with > 12.2(31)SB2 - short version: the router seems to incorrectly count > the size of the header, and drops packets bigger than 1482 bytes > (1500 - 18 byte ethernet header). > > No ICMP either, packet just gone.
Sigh, I thought about testing 12.2(31)SB7 but now I'am afraid that wouldn't help me. Thx! -- Gerald (ax/tc) _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/