Veiw dropped packets on Cisco devices.

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mukamba
Posts: 4
Joined: Tue Jan 04, 2011 8:23 am

Veiw dropped packets on Cisco devices.

#1 Post by mukamba » Thu Feb 24, 2011 12:51 am

Hi,

is it possible to view the dropped packet counter for each interface? For instance an additional graph with this information?

Greetings

dignome
Posts: 8
Joined: Sat Jan 29, 2011 4:01 pm

Re: Veiw dropped packets on Cisco devices.

#2 Post by dignome » Thu Feb 24, 2011 1:01 am

Hi. I'm thinking you would use data query "snmp - interface statistics." In which case you would chose to graph Errors/Discarded Packets.

mukamba
Posts: 4
Joined: Tue Jan 04, 2011 8:23 am

Re: View dropped packets on Cisco devices.

#3 Post by mukamba » Fri Feb 25, 2011 11:36 am

I wasn´t sure if error/discarded packets is the same as dropped packets.

I think the mib would be:

.1.3.6.1.4.1.9.2.2.1.1.26
locIfInputQueueDrops OBJECT-TYPE
-- FROM OLD-CISCO-INTERFACES-MIB
SYNTAX Integer
MAX-ACCESS read-only
STATUS Mandatory
DESCRIPTION "The number of packets dropped because the
input queue was full."
::= { iso(1) org(3) dod(6) internet(1) private(4) enterprises(1) cisco(9) local(2) linterfaces(2) lifTable(1) lifEntry(1) 26 }

dignome
Posts: 8
Joined: Sat Jan 29, 2011 4:01 pm

Re: Veiw dropped packets on Cisco devices.

#4 Post by dignome » Fri Feb 25, 2011 3:05 pm

Yes, ifInDiscards is only a subset of locIfInputQueueDrops while ifOutDiscards is the same as locIfOutputQueueDrops.

The below cisco article talks about this near the bottom of the page:
http://www.cisco.com/en/US/tech/tk648/t ... 69ac.shtml

"What is the relationship between the show interfaces statements no buffers and input queue drops? Why do the inDiscards of SNMP give no buffers counts and not input queue drops, while the outDiscards of SNMP do give output queue drops?"


Here is a post where someone has modified their interface.xml file to add the locIfInputQueueDrops definition:

http://forums.cacti.net/post-39150.html

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