topic RE: EXOS traceroute displaying !O flag on each response in ExtremeSwitching (EXOS/Switch Engine)

EXOS traceroute displaying !O flag on each response

Luis_Rivera — Fri, 19 Feb 2016 04:45:00 GMT

When executing a trace route to a LAN address from a switch Core Black Diamonf 8010, it sends me the following output
1 10.7.136.146 4 ms !O 7 ms !O 1 ms !O
2 10.7.136.146 5 ms !O 1 ms !O 5 ms !O
3 *
3 10.7.136.146 3 ms !O *
4 10.7.136.146 4 ms !O * 9 ms !O
5 *My question is what does the !O mean, It seams like I am having a route flapping, rigth?

Thanks in advanced for your answr

RE: EXOS traceroute displaying !O flag on each response

Patrick_Voss — Fri, 19 Feb 2016 04:53:00 GMT

Hi Luis,

What version of code are you running? The command reference guide should have something about this flag.

RE: EXOS traceroute displaying !O flag on each response

Luis_Rivera — Fri, 19 Feb 2016 04:58:00 GMT

ExtremeXOS version 15.7.2.9 v1572b9 by release-manager

RE: EXOS traceroute displaying !O flag on each response

Patrick_Voss — Fri, 19 Feb 2016 05:03:00 GMT

Do the flags show up after the command is finished running?

RE: EXOS traceroute displaying !O flag on each response

Luis_Rivera — Fri, 19 Feb 2016 05:07:00 GMT

Yes It does, the flags are shown for all the 30 hops until finished

RE: EXOS traceroute displaying !O flag on each response

Luis_Rivera — Fri, 19 Feb 2016 05:18:00 GMT

Yes they do, the flags are shown for all the 30 hops until finished

RE: EXOS traceroute displaying !O flag on each response

Luis_Rivera — Fri, 19 Feb 2016 06:36:00 GMT

ok, thaks, for your help

regards

RE: EXOS traceroute displaying !O flag on each response

Paul_Thornton — Fri, 19 Feb 2016 21:03:00 GMT

Hi

I've never seen the '!O' output on a line - and it isn't in Cisco's list of letters that traceroute responds with sometimes.

Normally, when traceroute says "!something" it means that an ICMP message other than echo reply came back, and the letter determines what that ICMP message was.

But I can't help you with the !O ... perhaps someone else knows that magic code.

Paul.

RE: EXOS traceroute displaying !O flag on each response

Stephane_Grosj1 — Fri, 19 Feb 2016 21:22:00 GMT

Hi,

this flag should have been added to the list, I'm surprised this is not the case. This is the catch all entry in the code. It means "other", ie the result was one of the missing types (types not defined in the code).