hi all,
I have a serious problem with nexus 7018, there're unicast flooding on one n7k, named n7k-1, which is the member of vPC domain combined with 2 N7Ks.
And I think I've already got the reason why this happened.
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That is, some modules lost several addresses in their mac-address-tables.
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N7K-1# show module
Mod Ports Module-Type Model Status
--- ----- -------------------------------- ------------------ ------------
1 48 10/100/1000 Mbps Ethernet XL Mod N7K-M148GT-11L ok
2 48 1000 Mbps Optical Ethernet XL Mo N7K-M148GS-11L ok
5 48 1000 Mbps Optical Ethernet XL Mo N7K-M148GS-11L ok
7 48 1000 Mbps Optical Ethernet XL Mo N7K-M148GS-11L ok
8 48 1000 Mbps Optical Ethernet XL Mo N7K-M148GS-11L ok
......
N7K-1# show mac address-table count
MAC Entries for all vlans :
Dynamic Address Count: 5692
Static Address (User-defined) Count: 0
Secure Address Count: 0
N7K-1#
N7K-1# show mac address-table 1 dynamic | in "dynamic" | wc -l
5598
N7K-1#
N7K-1# show mac address-table 2 dynamic | in "dynamic" | wc -l
5595
N7K-1#
N7K-1# show mac address-table 5 dynamic | in "dynamic" | wc -l
5665
N7K-1#
N7K-1# show mac address-table 7 dynamic | in "dynamic" | wc -l
5605
N7K-1#
N7K-1# show mac address-table 8 dynamic | in "dynamic" | wc -l
5593
N7K-1#
See, all mac counts are different from the global mac-address-table on N7K-1.
But, N7K-2 does not have this problem, all modules are ok.
N7k-2#
N7k-2# show mac address-table count
MAC Entries for all vlans :
Dynamic Address Count: 5692
Static Address (User-defined) Count: 0
Secure Address Count: 0
N7k-2#
N7k-2#
N7k-2#
N7k-2# show mac address-table 1 dynamic | in "dynamic" | wc -l
5692
N7k-2#
N7k-2# show mac address-table 2 dynamic | in "dynamic" | wc -l
5692
N7k-2#
N7k-2# show mac address-table 5 dynamic | in "dynamic" | wc -l
5692
N7k-2#
N7k-2# show mac address-table 7 dynamic | in "dynamic" | wc -l
5692
N7k-2#
N7k-2# show mac address-table 8 dynamic | in "dynamic" | wc -l
5692
N7k-2#
I had clean the mac-address-table, and all mac-address-tables had been synced fine, and the unicast flooding went away.
.
But it came back again after a few hours.
How could I fix the mac-address sync function between the modules ?
Thanks.
Dayong
