Below are the configuration requirement for IPN network.
1. Routed Sub-Interface with Vlan-4 : IPN device interface which is connected to Spine must be a sub interface and tag to vlan 4. We cannot use routed port or SVI for the interconnection. Also no other vlan tag can be used.
2. IPN device must support 9150B mtu and it is a mandatory requirement. Make sure all device in the path must support jumbo frames. Otherwise MP-BGP will flap between the SPINes of different PODs.
3. IPN device must support PIM BiDIR. It is used to carry BUM (Broadcast, unknown unicast and multicast) traffic.
4. OSPF protocol. Only OSPF protocol can be configured between IPN and ACI fabric (Spines). No other protocol can be used.
5. DHCP relay must be configured if you want to perform the zero touch deployment of POD 2.
6. QOS POlicy:- It is not a madatory requirement but it is good to prioritize the Multipod control packets.
Hardware requirement:-
IPN device can be any box which can support aforementioned features. generally below hardware are used for IPN.
1. Nexus 7000
2. ASR 1K
3. N3K-C3548P-10GX
N3K-C3172PQ-10GE cannot be used as IPN device.
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