On 3/2/25 23:16, john doe wrote:
I’m looking for equipment to build a 100G MPLS/SR network. This won’t be a large setup—likely around six PE routers connected in a 100G ring, with distances ranging from 100 km to 400 km. These routers will also need to aggregate local links from 10G up to 100G. They don't need to carry a full table.
I'll ask about the WAN side of things. To get 100G across 400km, you can either lease an EoDWDM circuit from an optical carrier, or go with IPoDWDM and stick one of two options into the routers at either end: * A 100G QSFP28 ZR+ coherent pluggable, or * A 400G QSFP-DD ZR+ coherent pluggable. On an amplified optical network, the 400G QSFP-DD plug can be modulated to run at either 100G, 200G, 300G or 400G, depending how close to 400km you want to get. Since you only need 100G Day One, that should be very easy with such a plug at 400km. But because it's a QSFP-DD plug, you can scale up to 200G, 300G or 400G in the future. If this makes sense, be sure to choose a router that comes with 400G QSFP-DD ports, then. There might not be any technical benefit to running a 100G QSFP28 plug in an IPoDWDM scenario compared to just leasing a regular 100G EoDWDM circuit from your favourite optical provider. However, if you take it as an IPoDWDM service, you can easily switch to a 400G QSFP-DD plug in the future without having to involve them as much, or at all. But you would need to coordinate with them for the initial build, provided they can actually offer the service. Mark.