Hi, I have one query regarding the following content from the IGP UPA draft.
<snip> As UPA advertisements in IS-IS are advertised in existing Link State PDUs (LSPs) and the unit of flooding in IS-IS is an LSP, *it is recommended that, when possible, UPAs are advertised in LSPs dedicated to this type of advertisement. This will minimize the number of LSPs which need to be updated when UPAs are advertised and withdrawn.* </snip> What is meant by LSPs dedicated to this type of advertisement in the above highlighted text? My understanding is that we have only one ISIS LSP for all the content. If a given LSP can not fit into one packet, then it is put into multiple fragments. Does it refer to some enhancement where UPA prefixes are separately put into separate ISIS fragments dedicated for UPA prefixes? Or any other enhancement where we define a separate LSP type for UPA? Can somebody clarify this? Does any vendor support this kind of enhancement for UPA or any other ISIS feature? Regards, Kotesh
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