show ip of VLANs?

mguy

Is there a switch command that show the IP networks of the VLANs in a switch?

I would just do a show run and see the ip and netmask for the interface configured of a VLAN member (and reverse engineer it).

But there must be another way..

MAC_Addy

sh ip int br (show ip interface brief) will show all VLANs on a layer 3 switch

drkat

to add to what MAC_Addy already stated

show ip interface brief - will give you the IP address information of ANY layer 3 interface - so this is a very helpful command to remember..

Zartanasaurus

sh ip int br | i Vlan

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Zartanasaurus

sh ip arp Vlan# will give you the IPs that are active in that VLAN as well.

mguy

sh ip int brief

doesn't give you the mask of the vlan. what if i wanted to know the IP address of the gateway of the vlan? How do I go about doing that?

mguy

if im asked what is the ip add of the default-gateway (given it is the first host in the subnet) of VLAN 1?

show int vlan 1

*get the mask and get the answer there

spd3432

Default gateway may not be first host in the subnet. That would be a design thing. The architect may decide that using a /24 mask, all router interfaces would be .250 - .254. Back to your statement though, I don't have any switches around me, but I believe the default gateway is defined outside the vlan database (it applies to the switch, not a particularly vlan) so perhaps "sh ip default-gateway" would work.

mguy

spd3432 wrote: »

Default gateway may not be first host in the subnet. That would be a design thing. The architect may decide that using a /24 mask, all router interfaces would be .250 - .254. Back to your statement though, I don't have any switches around me, but I believe the default gateway is defined outside the vlan database (it applies to the switch, not a particularly vlan) so perhaps "sh ip default-gateway" would work.

I'm not finding this command. Anyone?

spd3432

mguy,

I checked two places -- packet tracer and a physical switch (Catalyst 2924xl).
Packet tracer -- "show ip default-gateway" returns a ^ under the 'd' indicating syntax error.
Physical switch -- "show ip default-gateway" returns the address that I'd assigned (and is displayed in the running-config).

vrek

Show run has the default gateway of a switch.

xXErebuS

sh run interface vlan###

xXErebuS

the default gateway of a switch maynot be the default gateway for the vlan in question