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ketut_171869's avatar
ketut_171869
Icon for Nimbostratus rankNimbostratus
Sep 27, 2014

High ICMP packet lost between F5 direct connect for HA

Hi Experts,

I am new to F5. Currently, I am testing two F5 with direct connection in between. I am planning to use this connection for HA

I have setup trunk, vlan and its self IP address:

  • F5-A: 192.168.1.1
  • F5-A: 192.168.1.2
  • VLAN: Tagged id 900

However, when I try to ping each other self IP, I saw not all ICMP replied (more than 50% packet lost).

Ping result from F5-A to F5-A:

PING 192.168.1.2 (192.168.1.2) 56(84) bytes of data.
64 bytes from 192.168.1.2: icmp_seq=5 ttl=255 time=0.791 ms
64 bytes from 192.168.1.2: icmp_seq=6 ttl=255 time=1.98 ms
64 bytes from 192.168.1.2: icmp_seq=9 ttl=255 time=2.00 ms
64 bytes from 192.168.1.2: icmp_seq=11 ttl=255 time=3.99 ms

TCPdump from F5-A show that all ICMP sequence sent out to F5-B

TCPdump on F5-B (ping destination), show that not all of the ICMP sequence is received. Also the received and sent ICMP is on vlan 0 rather than vlan 900:

listening on 0.0:nnn, link-type EN10MB (Ethernet), capture size 65535 bytes
14:46:21.127990 IP 192.168.1.1 > 192.168.1.2: ICMP echo request, id 19328, seq 5, length 64 in slot1/tmm9 lis= flowtype=0 flowid=0 peerid=0 conflags=0 inslot=4 inport=0 haunit=0 peerremote=00000000:00000000:00000000:00000000 peerlocal=00000000:00000000:00000000:00000000 remoteport=0 localport=0 proto=0 vlan=0
14:46:21.128026 IP 192.168.1.2 > 192.168.1.1: ICMP echo reply, id 19328, seq 5, length 64 out slot1/tmm9 lis= flowtype=134 flowid=570804762700 peerid=0 conflags=20 inslot=4 inport=0 haunit=0 peerremote=00000000:00000000:00000000:00000000 peerlocal=00000000:00000000:00000000:00000000 remoteport=0 localport=0 proto=0 vlan=0
14:46:22.128994 IP 192.168.1.1 > 192.168.1.2: ICMP echo request, id 19328, seq 6, length 64 in slot1/tmm9 lis= flowtype=0 flowid=0 peerid=0 conflags=0 inslot=4 inport=0 haunit=0 peerremote=00000000:00000000:00000000:00000000 peerlocal=00000000:00000000:00000000:00000000 remoteport=0 localport=0 proto=0 vlan=0
14:46:22.129007 IP 192.168.1.2 > 192.168.1.1: ICMP echo reply, id 19328, seq 6, length 64 out slot1/tmm9 lis= flowtype=134 flowid=570804762700 peerid=0 conflags=20 inslot=4 inport=0 haunit=0 peerremote=00000000:00000000:00000000:00000000 peerlocal=00000000:00000000:00000000:00000000 remoteport=0 localport=0 proto=0 vlan=0
14:46:25.130082 IP 192.168.1.1 > 192.168.1.2: ICMP echo request, id 19328, seq 9, length 64 in slot1/tmm9 lis= flowtype=0 flowid=0 peerid=0 conflags=0 inslot=4 inport=0 haunit=0 peerremote=00000000:00000000:00000000:00000000 peerlocal=00000000:00000000:00000000:00000000 remoteport=0 localport=0 proto=0 vlan=0
14:46:25.130119 IP 192.168.1.2 > 192.168.1.1: ICMP echo reply, id 19328, seq 9, length 64 out slot1/tmm9 lis= flowtype=134 flowid=570804762700 peerid=0 conflags=20 inslot=4 inport=0 haunit=0 peerremote=00000000:00000000:00000000:00000000 peerlocal=00000000:00000000:00000000:00000000 remoteport=0 localport=0 proto=0 vlan=0
14:46:27.132170 IP 192.168.1.1 > 192.168.1.2: ICMP echo request, id 19328, seq 11, length 64 in slot1/tmm9 lis= flowtype=0 flowid=0 peerid=0 conflags=0 inslot=4 inport=0 haunit=0 peerremote=00000000:00000000:00000000:00000000 peerlocal=00000000:00000000:00000000:00000000 remoteport=0 localport=0 proto=0 vlan=0
14:46:27.132184 IP 192.168.1.2 > 192.168.1.1: ICMP echo reply, id 19328, seq 11, length 64 out slot1/tmm9 lis= flowtype=134 flowid=570804762700 peerid=0 conflags=20 inslot=4 inport=0 haunit=0 peerremote=00000000:00000000:00000000:00000000 peerlocal=00000000:00000000:00000000:00000000 remoteport=0 localport=0 proto=0 vlan=0

We have check all the physical connection and also change the SFP as well, but it was not help

Questions:

  1. Is there any known issue for this problem?

  2. or any additional configuration required for both F5 to receive and reply all ICMP packet?

Appreciate for any suggestion. Thank you

application delivery
availability
deployment
devops
iRules
TMOS
TMSH

3 Replies

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  • Angelo's avatar
    Angelo
    Icon for Nimbostratus rankNimbostratus
    Sep 29, 2014

    are they physically plugged into each other or through a switch?

     

  • ketut_171869's avatar
    ketut_171869
    Icon for Nimbostratus rankNimbostratus
    Sep 30, 2014

    Both of them are plugged into each other (direct connect without Switch). Any suggestion?

     

    Thank you

     

  • Angelo's avatar
    Angelo
    Icon for Nimbostratus rankNimbostratus
    Oct 01, 2014

    then I cannot see a reason for the why this would happen. unless there is cable fault you can check the interface to see if there is problems on the NIC, this should be in your dmesg logs. run a ifconfig on the server and please but it on