disable SNMP trap on subinterfaces

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Mar 25th, 2007
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Hi all,

I want to disable receiving SNMP trap status from subinterfaces but still will receive trap from physical interface st. Already entered the command "no snmp trap link-status" but still DFM keep receiving traps. See my configuration below. Any suggestion?


interface GigabitEthernet0/0.1204

description *****for testing*****

encapsulation dot1Q 1204

ip unnumbered Loopback1001

ip helper-address ******

ip helper-address *****

no snmp trap link-status


interface GigabitEthernet0/0.1800

encapsulation dot1Q 1800

ip unnumbered Loopback1001

ip helper-address *****

no snmp trap link-status

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muttman15 Sun, 03/25/2007 - 18:48
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I would try adding this line

"no logging event link-status "

This was an issue that was hammering our syslog server and adding both your line above and this line seemed to do the trick

Joe Clarke Sun, 03/25/2007 - 21:13
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What version of IOS is this device running? Are you certain it is traps you are receiving, and not syslog messages? Please provide an example trap.

ariesc_33 Sun, 03/25/2007 - 21:59
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it is the interface status alarms...

ios version

(C7301-SPSERVICESK9-M), Version 12.4(6)T2


Event_Description OperationallyDown

Component IF-10.*.*.*/1902 [Gi0/2.3535]


OperStatus DOWN



AdminStatus UP

LastChangedAt 16-Mar-2007 12:26:22

IsFlapping false

MaxSpeed 1000000000


Martin Ermel Mon, 03/26/2007 - 00:55
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No DFM does not handle syslog messages, the only thing is that DFM can be configured to generate syslog messages for a specific event and forward it to a syslog receiver ( e.g RME);


look at line 1,4,7 and 8 of the event:

'Event_Description OperationallyDown '

'OperStatus DOWN '

'AdminStatus UP '

'LastChangedAt 16-Mar-2007 12:26:22'

this indicates, that it is not an event caused by a received trap, but generated based on the responses from the device to an active poll from DFM;

Enabled by default, DFM polls the gig interface if its 'ifAdminStatus' is set to 'UP';

but as its 'ifOperStatus' indicates 'DOWN', DFM assumes this is a fault;

DFM interface rules are based on the assumtion that all interfaces which are administratively up should also forward traffic (operational up);

You have 2 Options:

in DFM set the managed state of this interface to false;

on the device,configure the 'shutdown' command on the interface;

ariesc_33 Mon, 03/26/2007 - 01:13
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Enabled by default, DFM polls the gig interface if its 'ifAdminStatus' is set to 'UP'


Would it be possible to poll only the physical interface [gig 0/1] and not the subinterface [gig 0/1.222]?

Martin Ermel Mon, 03/26/2007 - 06:14
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open the detailed device view for the device:

DFM > Device Management > View Device Details

select the device, go to Interface Status - Interfaces

there you should see all interfaces and you can change the managed state for each

after all changes, apply the changes by selecting

Configuration > Polling and Threshold > Apply Changes

ariesc_33 Mon, 03/26/2007 - 23:28
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it takes about 30 minutes to open interface status probably because routers has around 4000 subinterface.

Only solution i can see right now is to disable polling from lms to router and enable on the router the manual trap sending..?

Any other suggestion?


Martin Ermel Fri, 03/30/2007 - 09:01
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what happens if you 'shutdown' the subinterace on the router?

with this command the SNMP ifAdminStatus is set to down and it shouldn't be an issue for DFM anymore.

I don?t know of a cli command to disable a bunch of (sub-)interfaces in DFM to workaround the GUI

Other possibility could be to generate an action (e.g. email) based on syslog for the physical if..


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