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Fahad_130290's avatar
Fahad_130290
Icon for Nimbostratus rankNimbostratus
Dec 30, 2013

GTM To LTM connection disrupted

I get a following message on the LTM

 

LTM LOGS +++++++++ Dec 28 09:01:08 xxxxxxxxxx mcpd[1927]: 01070533:3: evWrite finished with no byte sent to connection 0xad1ccb0 (user %big3d) - connection deleted. Dec 28 09:01:08 xxxxxxxxxx mcpd[1927]: 01070533:3: evWrite finished with no byte sent to connection 0xacd2920 (user %big3d) - connection deleted. Dec 28 09:01:08 xxxxxxxxxx mcpd[1927]: 01070533:3: evWrite finished with no byte sent to connection 0xad78518 (user %big3d) - connection deleted.

 

After this I see that the GTM to LTM is reset. Anyone seen such behavior?

 

GTM LOGS ++++++++

 

Dec 28 09:01:08 xxxxxxxxxx gtmd[2070]: 011ae019:4: Closing idle connection to Dec 28 09:01:08 xxxxxxxxxx gtmd[2070]: 011a500c:1: SNMP_TRAP: Box state change green --> red (Box on Server QA BE BigIPs: Unavailable) Dec 28 09:01:10 xxxxxxxxxx gtmd[2070]: 011ae020:5: Connection in progress to Dec 28 09:01:10 xxxxxxxxxx gtmd[2070]: 011ae01c:5: Connection complete to . Starting SSL handshake Dec 28 09:01:10 xxxxxxxxxx gtmd[2070]: 011ae01a:5: SSL handshake complete to Dec 28 09:01:10 xxxxxxxxxx gtmd[2070]: 011a500b:1: SNMP_TRAP: Box state change red --> green

 

application delivery
performance

3 Replies

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  • PeteWhite's avatar
    PeteWhite
    Icon for Employee rankEmployee
    Jan 14, 2014

    Routing instability?

     

    Try a long-term ping to check connectivity, use iqdump to capture iquery traffic.

     

  • SanjayP's avatar
    SanjayP
    Icon for Nacreous rankNacreous
    Jan 14, 2014

    Looks like network glitch. Check how many times connectivity is lost

     

    zgrep -i box gtm.*.gz

    Give traceroute from GTM to LTM. You can create a pool in GTM with as many hops in between GTM and LTM. Use ICMP gateway as monitor. from logs you will come to know which hop in between is having connectivity issue.

     

  • Fahad_130290's avatar
    Fahad_130290
    Icon for Nimbostratus rankNimbostratus
    Jan 14, 2014

    Thanks for the responses. In my case I have two GTM's at different location with two different network path polling the LTM.