vPort History Example
vPort History Example
The following is an example of utilizing the vport-history command to aid in troubleshooting connectivity issues.
In this example, host 1 and host 2 lost connectivity between 14:32 and 19:25 (approximate times).
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seliinnru00801 >> - port 2 >> host1@??? >> mac 3c:fd:fe:e4:16:d0 ip 192.168.29.1 vlan 3311 - port 8 >> host2@eth3 >> mac 3c:fd:fe:e4:2c:74 ip 192.168.29.38 vlan 3311 |
Sample One
•vport-history during impact period
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CLI (network-admin@seliinnru00802) > vport-history-show mac 3c:fd:fe:e4:2c:74 ip 192.168.29.38 vlan 3311 start-time 2020-09-28T12:13 end-time 2020-09-28T17:30 limit-output 1111 CLI (network-admin@seliinnru00802) > vport-history-show mac 3c:fd:fe:e4:16:d0 ip 192.168.29.1 vlan 3311 start-time 2020-09-28T12:13 end-time 2020-09-28T17:30 limit-output 1111 |
Sample Two
•vport history between a non impacted time
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CLI (network-admin@seliinnru00802) > vport-history-show mac 3c:fd:fe:e4:2c:74 ip 192.168.29.38 vlan 3311 start-time 2020-09-27T12:13 end-time 2020-09-27T17:30 limit-output 1111 CLI (network-admin@seliinnru00802) > vport-history-show mac 3c:fd:fe:e4:16:d0 ip 192.168.29.1 vlan 3311 start-time 2020-09-27T12:13 end-time 2020-09-27T17:30 limit-output 1111 |
Comparing sample one with sample 2 provides an insight on changes. If none this is not an Arista issue the customer has to review non-Arista aspects.
To further strengthen our assessment. we noticed rx pkt drops at one of the computes,
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root@compute-111-2:/etc/network/interfaces.d# ifconfig eth3 eth3 Link encap:Ethernet HWaddr 3c:fd:fe:e4:2c:74 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:21105260769 errors:0 dropped:696542 overruns:0 frame:0 <--------------- TX packets:15804864653 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:19228611178036 (19.2 TB) TX bytes:21650238850968 (21.6 TB) |
with no output errors on either of the ports.
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==================== port-stats-show ========================= time port ibytes iUpkts iBpkts iMpkts iCongDrops ierrs obytes oUpkts oBpkts oMpkts oCongDrops oerrs mtu-errs -------- ---- ------ ------ ------ ------ ---------- ----- ------ ------ ------ ------ ---------- ----- -------- 11:15:49 2 335T 414G 871K 20.6M 0 0 682T 508G 581M 25.3M 0 0 0 11:15:49 8 19.8T 14.7G 255K 773K 0 0 17.7T 18.7G 1.11G 6.48M 0 0 0 |