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xmzpfk123's avatar
xmzpfk123
Icon for Nimbostratus rankNimbostratus
Oct 16, 2024

I have a question about vlangroup.

안녕하세요 
최근에 vlangroup을 테스트 하다가 궁금한게 생겼습니다.
vlangroup을 설정하고 icmp를 통과시키고  tcpdump를 확인하면
두가지 유형으로 나옵니다.
사례 1

17:34:00.673678 6c:29:d2:a4:5b:82 > c6:f7:d5:79:71:46, ethertype 802.1Q (0x8100), length 85: vlan 11, p 0, ethertype IPv4, 10.65.154.22 > 165.244.178.4: ICMP echo request, id 19, seq 10242, length 40 in slot1/tmm0 lis=

17:34:00.673744 6e:29:d2:a4:5b:82 > c4:f7:d5:79:71:46, ethertype 802.1Q (0x8100), length 95: vlan 30, p 0, ethertype IPv4, 10.65.154.22 > 165.244.178.4: ICMP echo request, id 19, seq 10242, length 40 out slot1/tmm1 lis=_vlangroup

17:34:00.675591 c4:f7:d5:79:71:46 > 02:00:0c:07:ac:0a, ethertype 802.1Q (0x8100), length 85: vlan 30, p 0, ethertype IPv4, 165.244.178.4 > 10.65.154.22: ICMP echo reply, id 19, seq 10242, length 40 in slot1/tmm0 lis=

17:34:00.675611 c6:f7:d5:79:71:46 > 00:00:0c:07:ac:0a, ethertype 802.1Q (0x8100), length 95: vlan 11, p 0, ethertype IPv4, 165.244.178.4 > 10.65.154.22: ICMP echo reply, id 19, seq 10242, length 40 out slot1/tmm1 lis=_vlangroup

 

Case 2

If you look at the sequence number, there are 4 packets generated for each pass, sometimes only 2 vlangroups pass through at the end and sometimes all 4. What is the difference between the two?

 

thank you

vlangroup
  • Melissa_C's avatar
    Melissa_C
    Icon for Moderator rankModerator
    Oct 16, 2024

    Hello, 

     

    Thank you for posting your question regarding your vlan set up. I would like to suggest if you have an active support contract on your device with F5 that you create a support case as this may require more personal specific configuration information to determine the difference. It's ideal to not have specific details regarding your set up in a public forum. Cases can be created via https://my.f5.com/manage/s/ or by calling the support line North America Toll-Free : 1-888-882-7535 or International: +800 11-275435 or +1-206-272-6888. Also here is some information on VLANs that you can review to see if it helps in answering your question prior to creating a case. 

    Please let us know if any of this helps answer your question or gets you in the correct direction. 

     

    Thank you, 

     

    Melissa