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Yehey_100134's avatar
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Feb 01, 2011

Unable to ping Virtual server

Hi All,



I'm unable to ping our virtual server ( from our monitoring system. When i performed a tcpdump all i can see is icmp request but no replies from the LB.




I compared the configs on other virtual servers and all i can see is that arp is not enabled on Might this be causing the issue?










5 Replies

  • Hi Yehey,



    You'll definitely want ARP enabled on the virtual address:



    b virtual address list


    virtual address {}


    [root@ve1:Active] config ping


    PING ( 56(84) bytes of data.


    64 bytes from icmp_seq=1 ttl=255 time=4.09 ms


    64 bytes from icmp_seq=2 ttl=255 time=1.13 ms



    --- ping statistics ---


    2 packets transmitted, 2 received, 0% packet loss, time 1026ms


    rtt min/avg/max/mdev = 1.131/2.612/4.094/1.482 ms



    [root@ve1:Active] config b virtual address arp disable



    [root@ve1:Active] config ping


    PING ( 56(84) bytes of data.



    --- ping statistics ---


    3 packets transmitted, 0 received, 100% packet loss, time 2082ms



  • HI Aaron,



    I enabled ARP on that VIP but im still not able to ping it from a local server.




    [root@lb1:Active] config tcpdump -i vlan1 host


    tcpdump: listening on vlan1


    04:45:14.277739 > icmp: echo request (DF)


    04:45:15.277727 > icmp: echo request (DF)


    04:45:16.277306 > icmp: echo request (DF)


    04:45:17.277723 > icmp: echo request (DF)


    04:45:18.277376 > icmp: echo request (DF)


    04:45:19.276774 > icmp: echo request (DF)


    04:45:20.276336 > icmp: echo request (DF)


    04:45:21.276775 > icmp: echo request (DF)


    04:45:22.276277 > icmp: echo request (DF)





    [root@lb1:Active] config b virtual address list


    virtual address {


    route advertisement enable




    arp enable







    Any ideas on what might be hindering the icmp requests?












  • Do you have defined as a standard virtual server as well? If so, can you make sure it's set up as a host as opposed to a network virtual server?



  • We utilize two LB's for failover in case the primary goes down. is the primary and configured as a host while is the secondary and is configured as a network. We have a couple of vip configured with this setup and this is the only one i can't ping.



    I'm able to telnet to the vip and it forwards me to the primary node on the pool. Basically, the LB is working as designed, but im curious why it does not respond to pings. I checked the vlan configs on our router and all is good. We're running on Version: 9.4.1.






  • It could be because of this: