How to view IP address with known MAC address in EXOS

[shashank_sharma]

what should i do ? if i know the MAC address of the user and i want to get his ip . If its possible then please give me command for extreme switches.

[Mateusz_Haba]

Thanks for quick reply.

@Tomasz - I just enabled nodealias on my switch and tried to display table as follow:
show nodealias. Here's output:

* X440-19 # show nodealias

Max Entries: 422 Active Entries: 422

Purge Time: 10-26-2018 14:28:52 State: 2

Protocols Enabled: ip, ipv6, ospf, bgp, bootps, bootpc, vrrp, dhcps, dhcpc, bpdu, udp, mdns, llmnr, ssdp,

Ports Enabled:

1:1(0/157) 1:2(1/157) 1:3(1/157) 1:4(0/157) 1:5(0/157) 1:6(0/157)

1:7(1/157) 1:8(0/157) 1:9(2/157) 1:10(2/157) 1:11(2/157) 1:12(0/157)

1:13(0/157) 1:14(8/157) 1:15(0/157) 1:16(0/157) 1:17(1/157) 1:18(1/157)

1:19(2/157) 1:20(0/157) 1:21(0/157) 1:22(0/157) 1:23(2/157) 1:24(0/157)

1:25(2/157) 1:26(0/157) 1:27(0/157) 1:28(0/157) 1:29(0/157) 1:30(0/157)

1:31(0/157) 1:32(0/157) 1:33(0/157) 1:34(0/157) 1:35(0/157) 1:36(0/157)

1:37(0/157) 1:38(0/157) 1:39(0/157) 1:40(0/157) 1:41(0/157) 1:42(0/157)

1:43(0/157) 1:44(0/157) 1:45(0/157) 1:46(17/157) 1:47(0/157) 1:48(150/157)

1:49(0/157) 1:50(0/157) 1:51(0/157) 1:52(0/157) 2:1(1/157) 2:2(0/157)

2:3(2/157) 2:4(0/157) 2:5(4/157) 2:6(0/157) 2:7(1/157) 2:8(4/157)

2:9(3/157) 2:10(0/157) 2:11(1/157) 2:12(1/157) 2:13(0/157) 2:14(1/157)

2:15(0/157) 2:16(0/157) 2:17(2/157) 2:18(1/157) 2:19(7/157) 2:20(0/157)

2:21(7/157) 2:22(1/157) 2:23(9/157) 2:24(0/157) 2:25(2/157) 2:26(0/157)

2:27(0/157) 2:28(0/157) 2:29(2/157) 2:30(0/157) 2:31(1/157) 2:32(3/157)

2:33(2/157) 2:34(0/157) 2:35(1/157) 2:36(0/157) 2:37(0/157) 2:38(0/157)

2:39(5/157) 2:40(1/157) 2:41(0/157) 2:42(5/157) 2:43(2/157) 2:44(1/157)

2:45(0/157) 2:46(3/157) 2:47(0/157) 2:48(157/157) 2:49(0/157) 2:50(0/157)

2:51(0/157) 2:52(0/157)

I'm interested in port 1:39 which shows no aliases. Anything missing?

[Harkanwaljeet_S]

Hi Mateusz
To get IP and corresponding MAC reflected in the output of show iparp; you need to make that (another vlan) as L3 on switch; Or else you will be able to see the MAC addresses only (using show fdb).

Regards,
Harkanwaljeet Singh

[Mateusz_Haba]

Hi folks,

Let my hook up to this topic.
I've tried above commands but those will only show MAC's for VLAN where the switch is.

If I issue show iparp | include "MAC" it shows nothing. When I issue just show iparp it gives me MAC's of other switches which are in the same mgmt VLAN.
The question is: How can I get IP of device in another VLAN (directly connected to this specific switch).

[Tomasz]

Hi Mateusz,

If you have EXOS device with version that has "enable nodealias port all" you should try this for L2 (non-routing) switch. It will bind MAC, IP and port in single table you can display.

Hope that helps,
Tomasz

[Drew_C]

He'll get a chance to ask us a proper question when I un-suspend him on Monday.