[mrtg] Re: Upgrade of Cisco 7507 to IOS 12.0 hoses subinterfaces in MRTG?

[Scheidel, Greg]

Cisco IOS 12.0(3)T and up adds support so that sub-interfaces (serial, ATM,
frame-relay) are assigned individual SNMP IF #s.  Previously it was not an
absolute that sub-interfaces would have unique SNMP IF #s and could be
reported on individually (without resorting to using the CISCO-AAL5-MIB,
ATM-MIB (1), and CISCO-ATM_EXT-MIB, for ATM interfaces at least).

I would guess that what's happened is that the SNMP IF #s have changed for
your interfaces as a result of the sub-interfaces now being assigned their
own SNMP IF #s.

I recommend that you either do your own SNMPWALK or use cfgmaker (directing
to a temp file) on the router to confirm SNMP IF #s for all interfaces,
comparing this new info to what you have in your existing config file.

I also recommend that you use IP addresses (instead of the SNMP IF #s) to
reference your interfaces so as to minimize the possibility of problems like
this, or at least the impact, and that you *always* verify your SNMP IF#s
after doing any sort of update (adding/removing/changing interfaces,
upgrading IOS) on your router.

Greg S.

-----Original Message-----
From: Glenn Forbes Fleming Larratt [mailto:glratt at rice.edu]
Sent: Thursday, January 20, 2000 2:53 PM
To: mrtg at list.ee.ethz.ch
Subject: [mrtg] Upgrade of Cisco 7507 to IOS 12.0 hoses subinterfaces in
MRTG?

We recently upgraded a Cisco 7507 from IOS 11.1(24)CC to IOS 12.0(7)T.
After the upgrade, all seemed OK, including our MRTG config; however,
after the next config change (on another router) and resultant run of
cfgmaker and indexmaker, I repeatedly get:
================================================================
SNMP Error:
Received SNMP response with error code
  error status: noSuchName
  index 1 (OID: 1.3.6.1.2.1.2.2.1.10.13)
SNMPv1_Session (remote host: "our7507" [128.42.253.254].161
                  community: "ourcommname"
                 request ID: 831338780
                PDU bufsize: 8000 bytes
                    timeout: 2s
                    retries: 5
                    backoff: 1)
SNMPGET Problem for ifInOctets.13 ifOutOctets.13 sysUptime sysName
ifDescr.13
on ourcommname at our7507
SNMPGET: Failed to reach target: "13:ourcommname at our7507". I tried multiple
times!
SNMP Error:
Received SNMP response with error code
  error status: noSuchName
  index 1 (OID: 1.3.6.1.2.1.2.2.1.10.15)
SNMPv1_Session (remote host: "our7507" [128.42.253.254].161
                  community: "ourcommname"
                 request ID: 489624264
                PDU bufsize: 8000 bytes
                    timeout: 2s
                    retries: 5
                    backoff: 1)
SNMPGET Problem for ifInOctets.15 ifOutOctets.15 sysUptime sysName
ifDescr.15
on ourcommname at our7507
SNMPGET: Failed to reach target: "15:ourcommname at our7507". I tried multiple
times!
SNMP Error:
Received SNMP response with error code
  error status: noSuchName
  index 1 (OID: 1.3.6.1.2.1.2.2.1.10.8)
SNMPv1_Session (remote host: "our7507" [128.42.253.254].161
                  community: "ourcommname"
                 request ID: 146145327
                PDU bufsize: 8000 bytes
                    timeout: 2s
                    retries: 5
                    backoff: 1)
SNMPGET Problem for ifInOctets.8 ifOutOctets.8 sysUptime sysName ifDescr.8
on
ourcommname at our7507:
================================================================
All of the targets which are generating this error are related to
an ATM interface and its subinterfaces: in particular, target 8 is
automatically titled "ATM5/0/0.0-atm subif" and seems to actually
relate to the configuration of the whole interface, target 13 is
titled "ATM5/0/0.2-atm subif", and target 15 is titled
"ATM5/0/0.4-atm subif". It seems worthy of note that:

- target 6 is titled "ATM5/0/0", and seems to generated good data
on total traffic through the ATM interface, as it did before;

- target 7 has the "This Interface is one...commented out..." blurb,
and is titled "ATM5/0/0-atm layer"; target 9 also has the blurb and
is titled "ATM5/0/0-aal5 layer";

- target 10 is active, and titled "ATM5/0/0.0-aal5 layer", but seems
to generate a blank (all 0's) graph;

- target 14 is titled "ATM5/0/0.2-aal5 layer", and seems to generate
good data for the one subinterface; target 16 is titled "ATM5/0/0.4-aal5
layer", and seems to generate good data for the other.

Suggestions? MRTG 2.7.5 under Solaris 2.6.

        Thanks for any assistance,-g

Glenn Forbes Fleming Larratt       glratt at rice.edu
http://is.rice.edu/~glratt         Neil Talian?

Can *you* count to 1,000 ?


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