show arp problem

Question

Hello,

I have one Dell 3448 now. It have big different between "show arp" and "show bridge address-table". Please check the below output. Is it why they have big different?

When I type show arp

# show arp

ARP timeout: 60000 Seconds

Interface IP address HW address status
--------------- --------------- ------------------- ---------------
vlan 1 192.168.168.200 00:18:51:9d:50:b6 dynamic

but when I type using show bridge address-table

# show bridge address-table
Aging time is 300 sec

Vlan        Mac Address       Port     Type
-------- --------------------- ------ ----------
   1       00:17:0e:a1:64:09     e1    dynamic
   1       00:18:18:70:b1:18     e1    dynamic
   1       00:18:51:9d:50:b6     e1    dynamic
   1       00:18:51:b1:4a:70     e1    dynamic
   1       00:1c:23:d1:99:00     e1    dynamic
   1       00:24:dc:0b:a1:07     e1    dynamic
   1       00:26:f1:b9:09:80     e1    dynamic
   1       00:26:f1:bb:88:80     e1    dynamic
   1       00:30:18:a9:c9:11     e1    dynamic
   1       00:80:48:ba:d1:30    e25     secure
   1       84:2b:2b:0a:6b:1f    e25     secure
   1       84:2b:2b:0a:6b:21    e25     secure
   1       d4:85:64:6b:38:b0     e1    dynamic
   1       d4:85:64:6b:e0:94     e1    dynamic
   1       d4:85:64:c8:10:4a     e1    dynamic
   1       d8:d3:85:ae:26:0c     e1    dynamic

Thanks!

machiasiaweb2 · Answer

Hi,

Thanks for your description.

Firstly want to know how ARP learn, my understand is when some traffic go thru that port. For example e25. The ARP table will record at least MAC will shown. However, the above result will not shown it have arp data recorded for e25

Furthermore, I am looking for some method that mapping each ethernet port + IP + MAC together, and then trying to work some method for doing port security which base on port + IP + MAC address together.

Did any idea base on this? But it have device limitation, because it just is Dell 3448

Thanks!

machiasiaweb2 · Answer

Hello,

I also tried to generate some traffic out to see can switch get the information from there no not. However, that is no luck for me, so that is some of my queries.

The another situation you mentioned also very similar but not usable for me. Also, I just using lower end product, so many command also did not support.

BTW, any 3rd parties software can suggest? or PM to me if not allow to post here.

Thanks!

Networking General

show arp problem

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