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Solved
Cisco sg300 - port to IP mapping ?
Posted on 2012-12-26
Hello
is there a way to find out a mapping between physical port on the switch and the IP address of the connected device ?
Thanks & regards
is there a way to find out a mapping between physical port on the switch and the IP address of the connected device ?
Thanks & regards
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8 Comments
more specifically..I think you want to see an IP address of the device connected to your cisco box?
if yes...
see your arp table..it will show you IP coming through connected port.
if it is DSL modem connected and you want to see the IP...then do "who" or "sh user"
if yes...
see your arp table..it will show you IP coming through connected port.
if it is DSL modem connected and you want to see the IP...then do "who" or "sh user"
Active 1 day ago
see your arp table..it will show you IP coming through connected port.Hmmm... Here is what I get:
VLAN 1 00:08:5d:82:d1:e4 GE6
VLAN 1 00:08:9b:cc:cb:85 GE48
VLAN 1 00:0f:fe:2d:00:4c GE7
VLAN 1 00:12:79:48:a2:56 GE50
VLAN 1 00:14:c2:3b:11:08 GE49
VLAN 1 00:15:99:4b:ac:15 GE50
VLAN 1 00:16:46:a2:f6:ce GE8
VLAN 1 00:19:66:2d:15:02 GE29
VLAN 1 00:21:9b:72:f6:d0 GE5
VLAN 1 00:21:9b:73:00:63 GE23
VLAN 1 00:22:19:ca:7e:16 GE24
VLAN 1 00:23:18:f3:4e:93 GE35
VLAN 1 00:23:f8:62:ea:81 GE52
VLAN 1 00:25:64:b2:17:37 GE14
VLAN 1 00:40:8c:78:a8:6f GE26
VLAN 1 00:c0:b7:61:58:21 GE36
VLAN 1 08:00:37:8e:ae:a8 GE50
VLAN 1 08:2e:5f:bc:95:b3 GE12
VLAN 1 14:fe:b5:de:4b:6e GE30
VLAN 1 3c:07:54:27:ff:55 GE35
VLAN 1 80:ee:73:40:71:0a GE31
VLAN 1 8c:89:a5:7d:c4:26 GE15
VLAN 1 8c:89:a5:7d:c6:41 GE25
VLAN 1 8c:89:a5:7d:cb:f1 GE3
VLAN 1 bc:30:5b:b0:e3:4b GE9
VLAN 1 bc:30:5b:b0:e3:7b GE11
Better than nothing but if i could resolve the MAC to IP it would be most useful...
Active today
That shows you the MAC address in the forwarding table and which port it see's that MAC address on.
That looks more like the output of "show mac table". Not sure if on the SG300 the command to see the arp table is "show arp" or "show ip arp". Try one of those, once you find the IP address you want to know about then do "show mac table | i x.x.x.x" where "x.x.x.x" is the IP address you want to know about.
That looks more like the output of "show mac table". Not sure if on the SG300 the command to see the arp table is "show arp" or "show ip arp". Try one of those, once you find the IP address you want to know about then do "show mac table | i x.x.x.x" where "x.x.x.x" is the IP address you want to know about.
Active 1 day ago
Sorry a bit late responding - no sure how to "enable DHCP snooping" ? Most of our IPs are dynamic so it would be a godd starting point.
Attached a CLI reference, see at "DHCP snooping".
Basically it inspects every DHCP request, and stores the IP addresses in them in a nice table on the switch. It's for preventing rogue DHCP servers primarily, but also great for port-to-IP mapping.
Tamas
CLI-300-1-2-5.pdf
Basically it inspects every DHCP request, and stores the IP addresses in them in a nice table on the switch. It's for preventing rogue DHCP servers primarily, but also great for port-to-IP mapping.
Tamas
CLI-300-1-2-5.pdf
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