I see a lot of "UDP: bad checksum. ..." between two of my servers. I
haven't attached a tcpdump output of the packets because a) the packets
between machine A and B travel through a GRE tunnel and b) does anyone
have tcpdump filters or know how to finagle tcpdump into dumping the
embedded packet instead of the GRE header'd packet?
If not, I'll supply tcpdump output of the traffic.
David
----- Original Message -----
From: "David Ford" <[email protected]>
To: <[email protected]>
Sent: Saturday, October 13, 2001 9:12 PM
Subject: Tcpdump filters, problem with UDP and 2.4.x
> I see a lot of "UDP: bad checksum. ..." between two of my servers. I
> haven't attached a tcpdump output of the packets because a) the packets
> between machine A and B travel through a GRE tunnel and b) does anyone
> have tcpdump filters or know how to finagle tcpdump into dumping the
> embedded packet instead of the GRE header'd packet?
>
id this for NFS udp traffic ?
if it is then you will see it i have seen this on both 2.2.x and 2.4.x
kernels
it only shows up on the nfs server side for me though.
No, it is for DNS traffic.
James Stevenson wrote:
>>I see a lot of "UDP: bad checksum. ..." between two of my servers. I
>>haven't attached a tcpdump output of the packets because a) the packets
>>between machine A and B travel through a GRE tunnel and b) does anyone
>>have tcpdump filters or know how to finagle tcpdump into dumping the
>>embedded packet instead of the GRE header'd packet?
>>
>id this for NFS udp traffic ?
>if it is then you will see it i have seen this on both 2.2.x and 2.4.x
>kernels
>it only shows up on the nfs server side for me though.
>