[j-nsp] Issue with pseudo-wire attempting to establish across non LSP path

[Peter K]

 I was wondering if anyone is out there with experience supporting a BGP
based layer 2 VPLS\VPN environment using RSVP to signal pseudo-wire access.
Below is an outline of the general P\PE core configuration.



·         The core network comprised of P\PE LSR’s

·         BGP based RSVP based l2vpn signaling is fully meshed between all
P\PE core nodes

·         IGP is ISIS with wide-metrics and traffic engineering enabled

·         Named CSPF based mesh of LSPs exist between all P\PE core nodes



Goal is to deploy label switch routers specifically functioning only as PE
(distribution) nodes with direct connectivity to the P\PE (core) nodes and
avoid the configuration required for a full mesh of LSP’s and l2vpn
signaling between the P\PE core nodes and the PE distribution nodes.  Below
is an outline of requirements.



·         Leave current P\PE LSR RSVP l2vpn signaling and LSP full mesh
configuration intact

·         PE (distribution) node will utilize BGP\l2vpn route reflector
architecture with P\PE routers act as BGP l2vpn signal route reflectors

·         IGP configured as ISIS with wide-metrics and traffic engineering
enabled

·         Configure named LSP’s between the directly attached P\PE and PE
LSR’s

·         Avoid enabling RSVP auto-mesh feature



I am noticing the pseudo-wire is attempting to establish a session across a
routed link (with RSVP and MPLS enabled) without a defined LSP path causing
any pseudo-wires using that path to go down.   The pseudo-wire
re-establishes its connection when the IGP metric is modified and reroutes
traffic or when then named LSP is created between the two PE nodes.
Although this appears to be an issue regarding order of operations when
deploying a new node(d) in this configuration, is there a mechanism in place
to restrict pseudo-wires from trying to establish connections across a path
without an established LSP path across the connection?





Regards,





Peter Kalogerakos