Different types of ER-SPAN i.e type-1, type-2 and type-3 in cumulus ?


I don’t see option to configure different types of ER-SPAN i.e type-1, type-2 and type-3 in cumulus ?
FYI: https://tools.ietf.org/html/draft-foschiano-erspan-03#section-4.1
Can you please point to us to configure er-span type 1 in cumulus router, if its possible?

2 replies

Userlevel 3
The ERSPAN encap is all done in the ASIC, and therefore the capabilities depend on what ASIC you are using. For example, the Trident2 is not configurable, and uses ERSPAN type II. I doubt any of the ASICs would support type 1. It is basically the same as type 2, without the sequence number, which is critical for packet ordering.

Curious about the use-case; What is the reason for specifying ERSPAN type 1?
Thanks for the info ....
Actually, we are developing a Solution, which should support all types of ER-SPAN ... And one of the customer use case is to support Type-1. That's why curious about the type-1

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