6509 Server-VSS Switch Rack GG 10.36.x.x
I checked show mac-address-table interface port-channel 133
shows duplicate mac address:
* 2301 0050.5617.07a0 dynamic Yes 175 Po133
* 2301 0050.5617.07a0 dynamic Yes 45 Po133
* 2301 0050.5617.07a2 dynamic Yes 40 Po133
* 2301 0050.5617.07a2 dynamic Yes 215 Po133
* 2301 0050.5617.1000 dynamic Yes 10 Po133
* 2301 0050.5617.1000 dynamic Yes 130 Po133
* 2301 0050.5617.1002 dynamic Yes 10 Po133
* 2301 0050.5617.1002 dynamic Yes 130 Po133
* 2301 0050.5617.1540 dynamic Yes 50 Po133
* 2301 0050.5617.1540 dynamic Yes 130 Po133
* 2301 0050.5617.1542 dynamic Yes 50 Po133
* 2301 0050.5617.1542 dynamic Yes 75 Po133
* 2301 0050.5617.1cc0 dynamic Yes 10 Po133
* 2301 0050.5617.1cc0 dynamic Yes 210 Po133
* 2301 0050.5617.1cc2 dynamic Yes 5 Po133
* 2301 0050.5617.1cc2 dynamic Yes 215 Po133
* 2301 0050.5617.2660 dynamic Yes 55 Po133
* 2301 0050.5617.2660 dynamic Yes 75 Po133
* 2301 0050.5617.2662 dynamic Yes 55 Po133
* 2301 0050.5617.2662 dynamic Yes 75 Po133
* 2301 0050.5617.2820 dynamic Yes 5 Po133
* 2301 0050.5617.2820 dynamic Yes 130 Po133
* 2301 0050.5617.2822 dynamic Yes 5 Po133
* 2301 0050.5617.2822 dynamic Yes 130 Po133
* 2301 0050.5617.37e0 dynamic Yes 45 Po133
* 2301 0050.5617.37e0 dynamic Yes 210 Po133
* 2301 0050.5617.37e2 dynamic Yes 45 Po133
* 2301 0050.5617.37e2 dynamic Yes 185 Po133
* 2301 0050.5617.3cc0 dynamic Yes 40 Po133
* 2301 0050.5617.3cc0 dynamic Yes 130 Po133
* 2301 0050.5617.3cc2 dynamic Yes 40 Po133
* 2301 0050.5617.3cc2 dynamic Yes 75 Po133
* 2301 0050.5617.3f40 dynamic Yes 50 Po133
* 2301 0050.5617.3f40 dynamic Yes 75 Po133
* 2301 0050.5617.4320 dynamic Yes 25 Po133
* 2301 0050.5617.4320 dynamic Yes 130 Po133
* 2301 0050.5617.4322 dynamic Yes 45 Po133
* 2301 0050.5617.4322 dynamic Yes 75 Po133
* 2301 0050.5617.43a0 dynamic Yes 25 Po133
* 2301 0050.5617.43a0 dynamic Yes 130 Po133
* 2301 0050.5617.43a2 dynamic Yes 20 Po133
* 2301 0050.5617.43a2 dynamic Yes 75 Po133
* 2301 0050.5617.44e0 dynamic Yes 30 Po133
* 2301 0050.5617.44e0 dynamic Yes 215 Po133
* 2301 0050.5617.44e2 dynamic Yes 25 Po133
* 2301 0050.5617.44e2 dynamic Yes 215 Po133
* 2301 0050.5617.4780 dynamic Yes 55 Po133
* 2301 0050.5617.4780 dynamic Yes 215 Po133
* 2301 0050.5617.4782 dynamic Yes 55 Po133
* 2301 0050.5617.4782 dynamic Yes 210 Po133
* 2301 0050.5617.4ca0 dynamic Yes 55 Po133
* 2301 0050.5617.4ca0 dynamic Yes 130 Po133
* 2301 0050.5617.4ca2 dynamic Yes 55 Po133
* 2301 0050.5617.4ca2 dynamic Yes 130 Po133
* 2301 0050.5617.51e0 dynamic Yes 35 Po133
* 2301 0050.5617.51e0 dynamic Yes 75 Po133
* 2301 0050.5617.51e2 dynamic Yes 35 Po133
* 2301 0050.5617.51e2 dynamic Yes 75 Po133
* 2301 0050.5617.5260 dynamic Yes 0 Po133
* 2301 0050.5617.5260 dynamic Yes 130 Po133
* 2301 0050.5617.5262 dynamic Yes 0 Po133
* 2301 0050.5617.5262 dynamic Yes 130 Po133
* 2301 0050.5617.5880 dynamic Yes 15 Po133
* 2301 0050.5617.5880 dynamic Yes 215 Po133
* 2301 0050.5617.5882 dynamic Yes 20 Po133
* 2301 0050.5617.5882 dynamic Yes 180 Po133
* 2301 0050.5617.5a60 dynamic Yes 20 Po133
* 2301 0050.5617.5a60 dynamic Yes 130 Po133
* 2301 0050.5617.5a62 dynamic Yes 20 Po133
* 2301 0050.5617.5a62 dynamic Yes 130 Po133
r-tx-server-1#show interfaces status | inc 2301
Gi1/2/11 *** MediaSite Vide notconnect 2301 full auto 10/100/1000BaseT
Gi1/3/9 *** Culinary Video notconnect 2301 full auto 10/100/1000BaseT
Gi1/3/28 *** Culinary Video notconnect 2301 full auto 10/100/1000BaseT
Gi1/4/1 *** MEDIALX - E291 notconnect 2301 full auto 10/100/1000BaseT
Gi1/4/3 *** FACULTYWEB - E notconnect 2301 full auto 10/100/1000BaseT
Gi1/4/17 ***FACULTYWEB - S3 notconnect 2301 full auto 10/100/1000BaseT
Gi2/2/13 ** EMSDVCS1 ** connected 2301 a-full a-1000 10/100/1000BaseT
Gi2/2/14 ** EMSDVCS2 ** connected 2301 a-full a-1000 10/100/1000BaseT
Gi2/2/15 ** EMSDVCS3 ** connected 2301 a-full a-1000 10/100/1000BaseT
Gi2/2/16 ** EMSIISSQL ** connected 2301 a-full a-1000 10/100/1000BaseT
Gi2/2/17 ** EMSDVCS4 ** connected 2301 a-full a-1000 10/100/1000BaseT
Gi2/2/18 ** EMSDVCS5 ** connected 2301 a-full a-1000 10/100/1000BaseT
Gi2/2/21 *** ICHAIN *** notconnect 2301 auto auto 10/100/1000BaseT
r-tx-server-1#show arp | inc Incomplete
Internet 10.21.1.21 0 Incomplete ARPA
Internet 10.23.1.58 0 Incomplete ARPA
Internet 10.20.254.200 0 Incomplete ARPA
Internet 10.23.1.54 0 Incomplete ARPA
Internet 10.20.254.202 0 Incomplete ARPA
Internet 10.33.3.21 0 Incomplete ARPA
Internet 10.34.1.20 0 Incomplete ARPA
Internet 10.41.0.29 0 Incomplete ARPA
Internet 198.150.241.240 0 Incomplete ARPA
Internet 10.35.1.116 0 Incomplete ARPA
Internet 10.39.0.115 0 Incomplete ARPA
Internet 10.23.100.11 0 Incomplete ARPA
Internet 10.199.0.12 0 Incomplete ARPA
Internet 10.39.0.202 0 Incomplete ARPA
Internet 10.199.0.53 0 Incomplete ARPA
Internet 10.20.251.30 0 Incomplete ARPA
My question is why are the IP addresses incomplete?
Best Answer
An ARP entry is marked as incomplete when the device in question (in this case your switch) can't get an ARP response from the host.
This generally means that host IP doesn't exist, or you are filtering ARP responses on either the host (generally difficult to do), or on the switch (eg: using a VLAN access-map and blocking the ARP Ethertype).
If your switch is L3 (eg: it is routing to each of those subnets), then it may be that devices elsewhere in your network are trying to reach them, and while the switch has the subnet locally attached to it, it cannot resolve ARP and work out the destination MAC.
I could be wrong, but I think VLAN ID is in the second last column of your output, in which case, you have a bunch of different VLANs all trunked on
Po133
and you are just seeing the same MAC in multiple VLANs (which is perfectly legitimate.Keep in mind that ARP Tables and MAC-address-tables are two very different things - one relates to routing (L3), and one to switching (L2).