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Eric Greene
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Inter-VLAN routing configurations (Cisco Catalyst 2960)

I have a Catalyst 2960 that has some L3 capabilities. I have other switches throughout my network that are also L3 capable (all Cisco). I have very little skill in the Cisco IOS and need to ask some basic questions for which I can't seem to find the answer in my searches.

  1. When doing L3 switching with inter-VLAN routing, do all other switches need to come back to a primary L3 switch?
  2. If no to #1, then what if I have multiple groups of switches that are inter-connected with the primary L3 switch connecting to only one of them?

I have uploaded a diagram of what I inherited.  I emphasize "inherited" because I already know that I have too many separations between some switches and am planning to fix that. The meat of my question is this:

Can someone please help me understand where all of the L3 logic needs to be? Does only one switch act as the routing switch, or do they all have to possess the same routing configuration? I know all switches have to be VLAN-capable switches, but do they all have to be L3?
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Predrag Jovic

8/22/2022 - Mon
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SIM50

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Eric Greene

ASKER
The 2960 is not L2 only.  It depends on the model.  It is basically L2, but has other features.
From Cisco's specs:
Cisco Catalyst 2960-XR models also offer:
  • Power resiliency with optional dual field-replaceable power supplies
  • IP Lite Cisco IOS software with dynamic routing and Layer 3 features

With that in mind, Am I to assume it cannot act as the routing switch?
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Predrag Jovic

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SIM50

You're right. 2960-XR does have some L3 support.
Predrag Jovic

2960, 2960-s, 2960-x too, it is old feature ...
:)
However, 2960-XR have even new abilities.
Catalyst 2960-XR Switch Routing Configuration Guide, Cisco IOS Release 15.0(2)EX1
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William Peck
SIM50

Never would of thought to use them as L3 switches... Interesting non the less.
Eric Greene

ASKER
Thank you for all of the input!
Predrag Jovic

You can now set up parameters for the selected routing protocols as described in these sections:

    RIP
    OSPF,
    EIGRP
    Unicast Reverse Path Forwarding
    Protocol-Independent Features (optional)
This is my equivalent of dirty talk. :)
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Predrag Jovic

Check configuration details on the link for 2960-XR since there are a lot of new things added, so configuration of switch for routing can be different from I wrote above.