I have simple hub and spoke topology with ASR9K used as a hub and ASR1K's as spokes. ASR9K configured for l2vpn domain:
interface Loopback0
ipv4 address x.x.a.144 255.255.255.255
!
l2vpn
bridge group group_name
bridge-domain bd441
neighbor x.x.x.147 pw-id 441
neighbor x.x.y.127 pw-id 441
neighbor x.x.z.40 pw-id 441
routed interface BVI441
!
Two of ASR1K connected works fine, but x.x.x.147 (IOS XE 3.5.0) still shows VC status down.
Here is detailed debug outputs and configuration from x.x.x.147:
mpls label range 16000 1048575
mpls ldp router-id Loopback1 force
mpls ip
interface Loopback1
ip address x.x.x.147 255.255.255.255
interface TenGigabitEthernet0/1/0.441
encapsulation dot1Q 441
xconnect x.x.a.144 441 encapsulation mpls
interface TenGigabitEthernet1/0/0.997
encapsulation dot1Q 997
ip address x.x.g.194 255.255.255.252
mpls ip
router ospf 1
router-id x.x.x.147
redistribute connected subnets
network x.x.g.192 0.0.0.3 area 0
ASR1K#show mpls l2transport vc 441 detail
Local interface: Te0/1/0.441 up, line protocol up, Eth VLAN 441 up
Destination address: x.x.a.144, VC ID: 441, VC status: down
Output interface: none, imposed label stack {}
Preferred path: not configured
Default path: no route
No adjacency
Create time: 00:01:54, last status change time: 00:01:54
Signaling protocol: LDP, peer x.x.a.144:0 up
Targeted Hello: x.x.x.147(LDP Id) -> x.x.a.144, LDP is UP
Status TLV support (local/remote) : enabled/supported
LDP route watch : enabled
Label/status state machine : remote ready, LndRru
Last local dataplane status rcvd: No fault
Last BFD dataplane status rcvd: Not sent
Last local SSS circuit status rcvd: DOWN(not-forwarding)
Last local SSS circuit status sent: Not sent
Last local LDP TLV status sent: None
Last remote LDP TLV status rcvd: No fault
Last remote LDP ADJ status rcvd: No fault
MPLS VC labels: local unassigned, remote 16887
PWID: 4563
Group ID: local unknown, remote 47
MTU: local unknown, remote 1500
Remote interface description: Access PW
Sequencing: receive disabled, send disabled
Control Word: Off (configured: autosense)
VC statistics:
transit packet totals: receive 0, send 0
transit byte totals: receive 0, send 0
transit packet drops: receive 0, seq error 0, send 0
ASR1K(config-subif)# no xconnect x.x.a.144 441 encapsulation mpls
ASR1K(config-subif)# xconnect x.x.a.144 441 encapsulation mpls
Jan 12 14:49:25.644 EET: AToM[x.x.a.144, 441]: FSM init LndRnd
Jan 12 14:49:25.644 EET: AToM[x.x.a.144, 441]: Dataplane : No fault
Jan 12 14:49:25.644 EET: AToM[x.x.a.144, 441]: FFD : No fault
Jan 12 14:49:25.644 EET: AToM[x.x.a.144, 441]: AC status DOWN(not-forwarding)
Jan 12 14:49:25.644 EET: AToM[x.x.a.144, 441]: Provisioned
Jan 12 14:49:25.644 EET: AToM[x.x.a.144, 441]: Evt provision, idle -> provisioned
Jan 12 14:49:25.644 EET: AToM[x.x.a.144, 441]: . Provision vc
Jan 12 14:49:25.644 EET: AToM LDP[x.x.a.144, 441]: LDP OPEN request
Jan 12 14:49:25.644 EET: AToM[x.x.a.144, 441]: . NMS: VC oper state: DOWN
Jan 12 14:49:25.644 EET: AToM[x.x.a.144, 441]: . NMS: err codes: no-fwdg
Jan 12 14:49:25.644 EET: AToM[x.x.a.144, 441]: SYSLOG: VC is DOWN, PW Err
Jan 12 14:49:25.644 EET: AToM LDP[x.x.a.144, 441]: Signaling peer-id of VC changed to x.x.a.144
Jan 12 14:49:25.644 EET: AToM[x.x.a.144, 441]: Evt remote ready, provisioned -> remote ready
Jan 12 14:49:25.644 EET: AToM[x.x.a.144, 441]: . Receive remote vc label binding, instance 1
Jan 12 14:49:25.644 EET: AToM[x.x.a.144, 441]: . Adjacency : No fault
Jan 12 14:49:25.644 EET: AToM[x.x.a.144, 441]: .. S:Evt ADJ up in LndRnd
Jan 12 14:49:25.644 EET: AToM[x.x.a.144, 441]: .. S:Evt dataplane clear fault in LndRnd
Jan 12 14:49:25.644 EET: AToM[x.x.a.144, 441]: . Check if remote connected
Jan 12 14:49:25.644 EET: AToM[x.x.a.144, 441]: .. Remote label is ready
Jan 12 14:49:25.644 EET: AToM[x.x.a.144, 441]: .... S:Evt remote ready, LndRnd -> LndRrd
Jan 12 14:49:25.644 EET: AToM[x.x.a.144, 441]: .... S:Evt remote up, LndRrd -> LndRru
Jan 12 14:49:25.644 EET: AToM[x.x.a.144, 441]: .... S:Act send SSS(UP)
Jan 12 14:49:25.644 EET: AToM[x.x.a.144, 441]: ..... [no service]
Jan 12 14:49:25.644 EET: AToM[x.x.a.144, 441]: .... S:Evt ADJ up in LndRru
Jan 12 14:49:25.644 EET: AToM[x.x.a.144, 441]: .... S:Act send SSS(UP)
Jan 12 14:49:25.644 EET: AToM[x.x.a.144, 441]: ..... [no service]
Jan 12 14:49:25.644 EET: AToM[x.x.a.144, 441]: .. Yes, connected
Jan 12 14:49:25.644 EET: AToM LDP[x.x.a.144]: Hello adj created with local address 0.0.0.0
Jan 12 14:49:25.644 EET: AToM LDP[x.x.a.144]: Opening session, 1 clients
Jan 12 14:49:25.644 EET: ldp-trgtnbr: x.x.a.144 -> x.x.a.144 Req active by client, MPLS AToM Circuit
Jan 12 14:49:25.644 EET: ldp-trgtnbr: Created avl tree for vrf default
Jan 12 14:49:25.644 EET: ldp-trgtnbr: x.x.a.144 allocated
Jan 12 14:49:25.644 EET: ldp-trgtnbr: x.x.a.144 Set peer start; flags 0x10
Jan 12 14:49:25.644 EET: ldp: ldp start; tbl 0
Jan 12 14:49:25.644 EET: ldp-trgtnbr: x.x.a.144 Defer peer cleanup; cleancnt 1
Jan 12 14:49:25.644 EET: ldp-trgtnbr: x.x.a.144 Set peer finished; flags 0x1F
Jan 12 14:49:25.644 EET: ldp-trgtnbr: x.x.a.144 ref count incremented to 1
Jan 12 14:49:25.644 EET: AToM LDP[x.x.a.144]: Session is up
Jan 12 14:49:25.644 EET: AToM LDP[x.x.a.144, 441]: LDP open
Jan 12 14:49:25.644 EET: AToM LDP[x.x.a.144, 441]: Signaling peer-id of VC changed to x.x.a.144
Jan 12 14:49:25.644 EET: AToM LDP[x.x.a.144, 441]: LDP UP
Jan 12 14:49:25.644 EET: AToM[x.x.a.144, 441]: Evt ldp up in remote ready
Jan 12 14:49:25.644 EET: AToM[x.x.a.144, 441]: . Take no action
As for me VC still down becouse local SSS circuit still down.
Last local SSS circuit status rcvd: DOWN(not-forwarding)
I try to compare two debug outputs from this one and working ASR1K and see that's in work case session continues with suc
Jan 12 14:10:59: AToM MGR [x.x.a.144, 441]: Receive SSS STATUS(UP)
Jan 12 14:10:59: AToM MGR [x.x.a.144, 441]: . AC status UP
Jan 12 14:10:59: AToM MGR [x.x.a.144, 441]: ... S:Evt local up, LndRru->LnuRru
Jan 12 14:10:59: AToM MGR [x.x.a.144, 441]: .. Event local ready, state changed from remote ready to establishing
Jan 12 14:10:59: AToM MGR [x.x.a.144, 441]: .... Alloc local binding
...
What "SSS" mean, why it has status down and how to fix it?
ASR1K#show int TenGigabitEthernet 0/1/0.441
TenGigabitEthernet0/1/0.441 is up, line protocol is up
...
Thanks for any ideas
