--- Begin Message ---Robert Raszuk wrote: > Hi Victor, > > ISIS has analogy to OSPF down bit integrated if this was your question. Hopefully it is. > But > do check with your implementation to make sure if it supports ISIS leaking. > > PE-CE ISIS is inheriting loop prevention which was defined for ISIS route > leaking between levels in RFC2966 Looks like it. Thank you for the hint! > > " This document redefines this high-order bit in the default metric > > field in TLVs 128 and 130 to be the up/down bit." What would be the Cisco command to enable/disable this feature in IS-IS ? That would be the easiest way to check if the implementation supports it.Last time I checked (and it seems nothing has changed since) IS-IS can't run in a VRF, so you can't use it for MPLS-VPN PE-CE links. IGP support on PE-CE links (like OSPF, EIGRP and RIP [sigh]) has been implemented to enable a seamless transition of typical Enterprise networks from L2 to L3-VPNs. And as ISIS is not a typical Enterprise IGP, it has not been top of mind.. oli
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