Re: [hobbit] Re: Devmon causing core dumps

[Buchan Milne <bgmilne (at) staff.telkomsa.net>]

On Friday 31 October 2008 19:55:35 Robert Holden wrote:
> When I run snmpwalk on my interfaces I get the following:
> (I believe that the devmon template is using this ... notice that they are
> all the same.

Depending on the SNMP implementation (and may differ on different IOS 
versions). 

> A transform won't help)
> IF-MIB::ifName.70 = STRING: AT5/0/0
> IF-MIB::ifName.71 = STRING: AT5/0/0
> IF-MIB::ifName.72 = STRING: AT5/0/0
> IF-MIB::ifName.73 = STRING: AT5/0/0
> IF-MIB::ifName.74 = STRING: AT5/0/0

One of our 7613's has:

IF-MIB::ifName.1 = STRING: Gi3/1
[...]
IF-MIB::ifName.128 = STRING: ATM10/1/0.0-atm subif
IF-MIB::ifName.129 = STRING: ATM10/1/0-aal5 layer
IF-MIB::ifName.130 = STRING: ATM10/1/0.0-aal5 layer
IF-MIB::ifName.131 = STRING: VLAN-1

> (This could be used, but you would end up w/ very long names.  G0/0 would
> become GigabitEthernet0/0)
> IF-MIB::ifDescr.70 = STRING: ATM5/0/0
> IF-MIB::ifDescr.71 = STRING: ATM5/0/0-atm layer
> IF-MIB::ifDescr.72 = STRING: ATM5/0/0.0-atm subif
> IF-MIB::ifDescr.73 = STRING: ATM5/0/0-aal5 layer
> IF-MIB::ifDescr.74 = STRING: ATM5/0/0.0-aal5 layer

On the same device as above:

IF-MIB::ifDescr.1 = STRING: GigabitEthernet3/1
[...]
IF-MIB::ifDescr.128 = STRING: ATM10/1/0.0-atm subif
IF-MIB::ifDescr.129 = STRING: ATM10/1/0-aal5 layer
IF-MIB::ifDescr.130 = STRING: ATM10/1/0.0-aal5 layer
IF-MIB::ifDescr.131 = STRING: unrouted VLAN 1

> (This may be helpful ... somehow ignore all type 37 and type 49, and sub
> interface 0 ??)
> IF-MIB::ifType.70 = INTEGER: sonet(39)
> IF-MIB::ifType.71 = INTEGER: atm(37)
> IF-MIB::ifType.72 = INTEGER: atmSubInterface(134)
> IF-MIB::ifType.73 = INTEGER: aal5(49)
> IF-MIB::ifType.74 = INTEGER: aal5(49)

But, in my case, I want to graph:
IF-MIB::ifName.103 = STRING: ATM10/1/0.1-aal5 layer

(it is the only interface which shows the correct traffic)

> I will open a bug if you like.  Is the issue that originated this thread
> the same as the one I am experiencing?

Well, there are two aspects to the bug:

1)Devmon should strip invalid characters out of interface names for the RRD 
data sent with the status message.

2)The Hobbit RRD collector module for devmon should not segfault if data is 
not in the format:

<name_without_spaces> value[:value[:value]]


Regards,
Buchan