[Sorry for the delay in responding to this]
On Mon, 2006-01-02 at 23:00 -0500, John Rouillard wrote:
> A tcpdump on S of the query from A is:
> 03:35:00.758456 IP (tos 0x0, ttl 64, id 469, offset 0, flags [DF], proto 17,
> length: 117) S.snmp > A.57133: [bad udp cksum 8a66!] { SNMPv2c
> { GetResponse(74) R=531627557
> system.sysUpTime.0=339026
> interfaces.ifTable.ifEntry.ifOutOctets.2=4067270909
> interfaces.ifTable.ifEntry.ifInOctets.2=1082932159 } }
>
> An snmpget -d shows:
> Received 89 bytes from S
> 0000: 30 57 02 01 01 04 06 70 75 62 6C 69 63 A2 4A 02 0W.....public.J.
> 0016: 04 7C 57 9B 3E 02 01 00 02 01 00 30 3C 30 0F 06 .|W.>......0<0..
> 0032: 08 2B 06 01 02 01 01 03 00 43 03 05 2C 58 30 13 .+.......C..,X0.
> 0048: 06 0A 2B 06 01 02 01 02 02 01 10 02 41 05 19 F2 ..+.........A...
> 0064: 6E 23 B5 30 14 06 0A 2B 06 01 02 01 02 02 01 0A n#.0...+........
> 0080: 02 41 06 02 BE 40 96 A7 6F [EMAIL
> PROTECTED]
Unpacking that dump, the if*Octets varbinds are as follows:
30 13
06 0A 2B 06 01 02 01 02 02 01 10 02 (ifOutOctets.2)
41 05 19 F2 6E 23 B5
^^^^^^^^^^^^^^
30 14
06 0A 2B 06 01 02 01 02 02 01 0A 02 (ifInOctets.2)
41 06 02 BE 40 96 A7 6F
^^^^^^^^^^^^^^^^^
These two values (indicated by ^^^^) are both > 32-bits,
and don't match the values listed in the tcpdump output.
These would be represented as (41 05) 00 f2 6d a0 fd
and (41 04) 40 83 cb bf respectively.
That also fits with the S->S results, which are both
larger than the maximum allowed for a 32-bit value.
It looks as if the agent isn't wrapping these counters properly
at 2^32, and this is confusing the (32-bit) clients.
Dave
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