> From: Oliver Boehmer (oboehmer) <[email protected]> > Sent: Friday, March 22, 2019 10:35 AM > > 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.. > Bang on as always, even if on other vendors this stunt was supported, OP would be well outside the well-trodden path - expect dragons....
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