determine switch is layer 3 switch and SVI

[Mary]

I log into one switch, without looking at model number, how do  i determine whether it is a layer 3 switch?

how to find all the SVI interfaces if it is layer 3 switch? thanks

[Ganesh Hariharan]

I log into one switch, without looking at model number, how do  i determine whether it is a layer 3 switch?

how to find all the SVI interfaces if it is layer 3 switch? thanks

Hi ,

Check show Ver and if the iOS is of ip services, ip base or ent. ip services then it has layer 3 funcationality.

and to see SVI interface in switch ...type command show ip int brief which will tell how many interfaces are been configured in switch.

Hope it Helps..

-GI

Rate if it Helps..

[Mary]

show ver no ip base license, does it mean layer 2 switch?

show ip int brief shows valn 103--106 with IP address, does it mean I have 4 SVI interface?

[Dennis Mink]

yes, it does. it is operating at L3 and you should be able to ping between the SVI interfaces on that switch. 

[Mary]

No, this is layer 2 switch, show version doesn't display any IP base license, but vlan 103 is configured with IP address, so you mean layer 2 can have SVI interface, why layer 2 switch has SVI.

my core switch IP is 10.50.1.1, and connected to checkpoint ethernet 2, my access switch 10.50.1.15 is connected to company router 10.52.1.1 ethernet 1 (external)

checkpoint ethernet 3(DMZ) connect to router 10.52.1.1

every laptop connected to the network should use 10.50.1.1 as default gateway or  10.52.1.1 

as default gatway?

[Ganesh Hariharan]

No, this is layer 2 switch, show version doesn't display any IP base license, but vlan 103 is configured with IP address, so you mean layer 2 can have SVI interface, why layer 2 switch has SVI.


my core switch IP is 10.50.1.1, and connected to checkpoint ethernet 2, my access switch 10.50.1.15 is connected to company router 10.52.1.1 ethernet 1 (external)

checkpoint ethernet 3(DMZ) connect to router 10.52.1.1

every laptop connected to the network should use 10.50.1.1 as default gateway or  10.52.1.1 

as default gatway?

Hi,

What is the output for show version and show ip route on your switch.

If it having routing table that means it is running in layer 3 , Hope that clairfiy your query.

-GI

Rate if it Helps

[Mary]

No, my question is (1) can layer 2 switch has SVI interface

(2) default gateway in my checkpoint/route/switch case, is core switch ip or router ip, and why?

[Ganesh Hariharan]

No, my question is (1) can layer 2 switch has SVI interface

(2) default gateway in my checkpoint/route/switch case, is core switch ip or router ip, and why?

Hi,

Yes, Layer 2 switch can have only one SVI for management purpose.

Gateway in your network devices can be anything based on your architecture and traffic flow what has been designed.

If it is core switch, it would defenetly be layer 3 switch which is doing aggregation on your network for other segments.

Hope that clarify your query..

-GI

Rate if it Helps..

[LukaszTJB]

Hey,

go into the privilege mode using the command 'enable' and run the command 'sh run | inc ip routing'. If there is an entry 'ip routing' in the running config the switch is operating in layer 3 mode. If you are looking for the capabilities of the router check the data sheet of the box you are connected to ;-)

[Joseph W. Doherty]

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". . . how do  i determine whether it is a layer 3 switch?"

Do you mean whether it's actually running as a L3 switch, or do you mean whether it's capable of running as a L3 switch?  Also, do you care how full featured a L3 switch it is?

If the switch has a routing table, then it's doing L3, but L3 features depend on the switch model, the installed IOS version and perhaps licensing.  The model number, alone, isn't always sufficient information.

As to finding SVI interfaces, you might try show int summary and look for VLAN interfaces.