Hi Guys,
Looking at re-designing our head office network (collapsed core) and want to go Routed at the access layer, to stop BUM traffic traversing the core and have some nice ECMP going off - and all the other nice features that go with this architecture.
We have Juniper Ex2300's in the access layer in a VC config at the moment with the standard feature set. These were only recently put in as a like for like replacement of the old access layer so these will have to stay.
We currently have vlans that span between 2 wiring closets via the core. so for example, vlan 10 exists on both access switches and the SVI/IRB for this vlan is on the core switches.
With the routed access layer, we don't want to re-ip if possible but we still want the flexibility to have these vlans exist on any switch - this is solved via a simple L2 trunk between the access switches (yes I know we should be using fancy overlay technologies but we are cost prohibited atm)
My question is to do with default gateways for the VLANs - now these will sit on the access layer, but the vlans will span both access layer switches - I was originally thinking VRRP between the access layer switches via the L2 trunk. however this is a licence based feature on Juniper 2300's (lol wut?) - So I was thinking about some sort of anycast gateway setup (if possible, and would this work?) - I could configure the same IRB on each access switch but change the mac address to the same value on each IRB per switch using the 'set mac' command - allowing an active/active gateway setup
would the above pose any issues? I am looking to lab this out but I would be interested to know if anyone has done anything like this before?
Thanks
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