Hello, How you doing
As far as i know thegeneric-interface-list are used by the router as a reference when it needs to use some resources like for example queues (remember taht pw-ether interfaces support QoS ). And yes if you want to enable a xconnect you need this generic-interface-list attached to the pw-ether
For example if you have a generic-interface-list that doesn´t have any interface defined
RP/0/RSP0/CPU0:PE5-BNG-ASR9K#show run generic-interface-list
Thu Nov 28 16:26:41.372 UTC
generic-interface-list il1
!
then you attach it to the pw-ether
RP/0/RSP0/CPU0:PE5-BNG-ASR9K#show run interface pw-eth66
Thu Nov 28 16:26:50.108 UTC
interface PW-Ether66
mtu 1574
vrf PRIV5
ipv4 address 66.0.0.1 255.255.255.252
attach generic-interface-list il1
!
then configure a xconnect
!
xconnect group group3
p2p P2P3
interface PW-Ether66
neighbor ipv4 3.3.3.30 pw-id 321
pw-class pwclass1
!
RP/0/RSP0/CPU0:PE5-BNG-ASR9K#show l2vpn xconnect
Thu Nov 28 16:28:05.765 UTC
Legend: ST = State, UP = Up, DN = Down, AD = Admin Down, UR = Unresolved,
SB = Standby, SR = Standby Ready, (PP) = Partially Programmed
XConnect Segment 1 Segment 2
Group Name ST Description ST Description ST
------------------------ ----------------------------- -----------------------------
group1 P2P1 UP BE1.200 UP 1.1.1.1 3210 UP
----------------------------------------------------------------------------------------
group3 P2P3 UR PE66 DN 3.3.3.30 321 UR // this neighbor doesn´t come up because the generic-interface-list doesn´t have any interface
----------------------------------------------------------------------------------------
but if you add any new interface to the generic-interface
RP/0/RSP0/CPU0:PE5-BNG-ASR9K(config)#generic-interface-list il1
RP/0/RSP0/CPU0:PE5-BNG-ASR9K(config-gen-if-list)#interface bundle-eth1
RP/0/RSP0/CPU0:PE5-BNG-ASR9K(config-gen-if-list)#
RP/0/RSP0/CPU0:PE5-BNG-ASR9K(config-gen-if-list)#commit
you can see this
RP/0/RSP0/CPU0:PE5-BNG-ASR9K#show l2vpn xconnect
Thu Nov 28 16:28:29.922 UTC
Legend: ST = State, UP = Up, DN = Down, AD = Admin Down, UR = Unresolved,
SB = Standby, SR = Standby Ready, (PP) = Partially Programmed
XConnect Segment 1 Segment 2
Group Name ST Description ST Description ST
------------------------ ----------------------------- -----------------------------
group1 P2P1 UP BE1.200 UP 1.1.1.1 3210 UP
----------------------------------------------------------------------------------------
group3 P2P3 UP PE66 UP 3.3.3.30 321 UP // voila, now is up
----------------------------------------------------------------------------------------
Good luck
