Show arp command
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05-14-2023 11:04 PM
Hi!
I have configured my Cisco catalyst 1000 series switch everything is working fine and I can see the Mac address-table as well but when I use show arp command it only show 2 connected devices and one of them is router and second one is switch it self. It doesn't show other devices that are connected.
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05-15-2023 04:16 AM
if the SW is L2 (i.e. you dont config any SVI in SW) then this is normal
the ARP send only from L3 interface,
here all traffic is bridging through the SW not routing
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05-15-2023 04:41 AM
work for. So how can I access arp list without routing?
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05-15-2023 05:22 AM
What you see is what SW use for management traffic'
The SW need arp to send management traffic it not relate to data traffic which need l3 for routing traffic (data).
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05-15-2023 07:12 AM
Ping every possible subnet IP on subnet or ping subnet (not guaranteed all hosts will reply to latter).
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05-15-2023 07:16 AM
command in configuration terminal, which have been up for about a week now
. But some are still not showing any devices
And they have been up for 3 days or 4.
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05-15-2023 07:28 AM
ip routing must used careful, we dont want to stop connectivity.
ip routing is config only in SW that have SVI and work as these SVI is GW for SW otherwise the SW is L2 and dont need ip routing.
the SW show arp is SW have SVI active and do inter-vlan between hosts
the SW dont show arp is SW that have SVI (for management only)
