Symptom

PW: neighbor 10.10.255.15, PW ID 120931151, state is down ( all ready ) (Segment-down) <<<<<< Active PW. PW class pwc-flow-cw-cr03, XC ID 0xc0000045 Encapsulation MPLS, protocol LDP Source address 10.241.12.103 PW type Ethernet, control word enabled, interworking none PW backup disable delay 0 sec Sequencing not set Load Balance Hashing: src-dst-ip Flow Label flags configured (Tx=1,Rx=1), negotiated (Tx=1,Rx=1) PW Status TLV in use MPLS Local Remote ------------ ------------------------------ --------------------------- Label 16095 16000 Group ID 0x1 0x0 Interface Access PW 120-ipoe01 MTU 4096 4096 Control word enabled enabled PW type Ethernet Ethernet VCCV CV type 0x2 0x2 (LSP ping verification) (LSP ping verification) VCCV CC type 0x7 0x7 (control word) (control word) (router alert label) (router alert label) (TTL expiry) (TTL expiry) ------------ ------------------------------ --------------------------- Incoming Status (PW Status TLV): Status code: 0x0 (Up) in Notification message <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< a931-cr03 Status was UP. MIB cpwVcIndex: 3221225541 Create time: 30/03/2016 10:50:32 (3w5d ago) Last time status changed: 26/04/2016 02:11:13 (00:45:39 ago) Last time PW went down: 26/04/2016 02:11:13 (00:45:39 ago) MAC withdraw messages: sent 0, received 2 Static MAC addresses: MAC learning: enabled Flooding: Broadcast & Multicast: enabled Unknown unicast: enabled MAC aging time: 15000 s, Type: inactivity MAC limit: 32000, Action: none, Notification: syslog MAC limit reached: no MAC port down flush: enabled MAC Secure: disabled, Logging: disabled Split Horizon Group: none DHCPv4 snooping: disabled IGMP Snooping profile: none MLD Snooping profile: none Storm Control: disabled List of VFIs:

Conditions

(ASR9k1) ---PW--- (ASR9k2) Reload on ASR9k1 can cause race condition on ASR9k2 when the latter has set of PWs establishing at the same time.

Workaround

Remove and add the PWs in problematic state

Further Problem Description