Hi all! I have recently been thrown into the deep end at my current employer (small telco/wisp). Senior network engineer quit recently so I am having to accelerate my learning of many things. I have my CCNA but I am still undoubtedly new to a lot of this.
My situation:
I am currently rebuilding a portion of our network that has a Cisco Nexus 3064 acting as a router, running OSPF. Obviously this is not ideal for many reasons, and as such I am playing with some design ideas involving Juniper ACX equipment. The rest of our network is running Juniper & MPLS/LDP/OSPF.
My plan:
- Make the Nexus only act on layer 2
- Have a VLAN for handling router-to-router communication. Essentially have OSPF neighbor-ship of 2 routers confined to a VLAN that only touches the 2 ports on Nexus the routers will be plugged in to
- Configure Nexus for jumbo frames
[Juniper ACX2100 <-> Nexus 3064 <-> Juniper MX960]
My question:
With the Nexus port MTU set to it's max at 9216 and both of the Juniper routers set to MTU 9014, should I expect any issues? Everything I have learned so far has taught me that "MTU should always match". However, My thought is this: since both Juniper routers on either side of this Nexus are set for MTU 9014, this should not matter since the Nexus MTU is larger than that of the frame it received/will forward.
I would appreciate any feedback/tips you might have. Apologies if this is a silly question.
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