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Case 2: When the Link from Router 1 to Router 3 Is Disabled

[edit]
user@Router1#  set interfaces so-7/3/2 disable

# The primary interface from Router 1 to Router 3 is disabled.

[edit]
user@Router1#  commit  
commit complete

Router 1

user@Router1> show mpls lsp

Ingress LSP: 1 sessions
To              From             State  Rt ActivePath       P     LSPname
10.245.71.52    10.245.71.51     Up      0 path1            *     Protected_LSP

# The main LSP is up.

Total 1 displayed, Up 1, Down 0
Egress LSP: 0 sessions
Total 0 displayed, Up 0, Down 0
Transit LSP: 1 sessions
To              From            State Rt Style Labelin Labelout LSPname 
10.245.71.52    10.245.271.53   Up     0  1 SE  100004        0 
Bypass->10.31.2.1

# The bypass LSP from Router 3 to Router 2.

Total 1 displayed, Up 1, Down 0

user@Router1>  show rsvp session detail
Ingress RSVP: 3 sessions
10.245.71.52
  From: 10.31.3.1, LSPstate: Up, ActiveRoute: 0
  LSPname: Protected_LSP

# The newly signaled backup LSP, as indicated by the To/From field.

  Resv style: 1 SE, Label in: -, Label out: 100000
  Time left:    -,  Since: Thu Aug  8 12:29:16 2002
  Tspec: rate 0bps size 0bps peak Infbps m 20 M 1500
  Port number: sender 2 receiver 33 protocol 0
  Link protection desired
  Type: Backup LSP at Point-of-Local-Repair
  PATH rcvfrom: localclient 
  PATH sentto: 10.31.1.2 (so-0/0/0.0) 4 pkts
  RESV rcvfrom: 10.31.2.2  (so-0/0/0.0) 3 pkts
  Explct route: 10.31.2.2 10.31.2.1 
  Record route: <self>  10.31.2.2  10.31.2.1
10.245.71.52
  From: 10.245.71.51, LSPstate: Dn, ActiveRoute: 0

# The original LSP is now down.

  LSPname: Protected_LSP
  Resv style: 0 -, Label in: -, Label out: -
  Time left:    -,  Since: Thu Aug  8 12:13:24 2002
  Tspec: rate 0bps size 0bps peak Infbps m 20 M 1500
  Port number: sender 2 receiver 33 protocol 0
  Link protection desired
  Type: Link protected LSP
  PATH rcvfrom: localclient 
  PATH sentto: [no route]
  Explct route: 10.31.1.2 10.31.2.1 
  Record route: <self>  ...incomplete

10.245.271.53
  From: 10.245.71.51, LSPstate: Up, ActiveRoute: 1
  LSPname: Bypass->10.31.1.2

# The bypass LSP from Router 1 to Router 2.

  Resv style: 1 SE, Label in: -, Label out: 100001
  Time left:    -,  Since: Thu Aug  8 12:26:48 2002
  Tspec: rate 0bps size 0bps peak Infbps m 20 M 1500
  Port number: sender 1 receiver 52 protocol 0
  Type: Bypass LSP
  PATH rcvfrom: localclient 
  PATH sentto: 10.31.3.2 (so-0/0/0.0) 13 pkts
  RESV rcvfrom: 10.31.3.2  (so-0/0/0.0) 13 pkts
  Explct route: 10.31.3.2 10.31.2.2 
  Record route: <self>  10.31.3.2  10.31.2.2
Total 3 displayed, Up 2, Down 1

Egress RSVP: 0 sessions
Total 0 displayed, Up 0, Down 0

Transit RSVP: 1 sessions

10.245.71.52
  From: 10.245.271.53, LSPstate: Up, ActiveRoute: 0
   LSPname: Bypass->10.31.2.1

# The bypass LSP from Router 3 to Router 2, which will fail in the next case.

  Resv style: 1 SE, Label in: 100004, Label out: 0
  Time left:   38,  Since: Thu Aug  8 12:27:07 2002
  Tspec: rate 0bps size 0bps peak Infbps m 20 M 1500
  Port number: sender 1 receiver 16 protocol 0
  PATH rcvfrom: 10.31.1.2  (so-7/3/2.0) 11 pkts
  PATH sentto: 10.31.3.2 (so-0/0/0.0) 12 pkts
  RESV rcvfrom: 10.31.3.2  (so-0/0/0.0) 12 pkts
  Explct route: 10.31.3.2 
  Record route: 10.31.1.2  <self>  10.31.3.2
Total 1 displayed, Up 1, Down 0

user@Router1>  show rsvp neighbor detail    
RSVP neighbor: 2 learned
Address: 10.31.1.2   via: so-7/3/2.0    status: Down

# The neighbor is down.

  Last changed time: 25, Idle: 25 sec, Up cnt: 2, Down cnt: 2
  Message received: 397
  Hello: sent 900, received: 890, interval: 3 sec
  Remote instance: 0x0, Local instance: 0x41b41b17
  Refresh reduction:  not operational
  Link protection:  enabled
    LSP name: Bypass->10.31.1.2
    Bypass LSP: operational,  Backup routes: 2,  Backup LSPs: 1
    Bypass explicit route: 10.31.3.2 10.31.2.2 
Address: 10.31.3.2   via: so-0/0/0.0    status: Up
  Last changed time: 25:40, Idle: 5 sec, Up cnt: 4, Down cnt: 3
  Message received: 502
  Hello: sent 558, received: 538, interval: 20 sec
  Remote instance: 0x194fa7af, Local instance: 0x507b7c2a
  Refresh reduction:  not operational
  Link protection:  disabled 
    Bypass LSP: does not exist,  Backup routes: 0,  Backup LSPs: 0

user@Router1>    show route 10.31.5.1
inet.0: 23 destinations, 23 routes (22 active, 0 holddown, 1 hidden)
+ = Active Route, - = Last Active, * = Both
10.31.5.1/32       *[RSVP/7] 00:03:04, metric 20 
                    > via so-0/0/0.0, label-switched-path Bypass->10.31.1.2
# The route can be reached by way of the backup LSP.

user@Router1>  show route forwarding-table destination 10.31.5.1
Routing table: inet
Internet:
Destination        Type RtRef Next hop          Type Index NhRef Netif
10.31.5.1/32       user     0                   Push 100000, Push 100001(top)[0] 
so-0/0/0.0
# Double-stacked labels appear on the backup LSP from Router 1 to 2 to 3.

Before proceeding to Case 3, reenable the so-7/3/2 interface on Router 1.

[edit]
user@Router1#  delete interfaces so-7/3/2 disable

[edit]
user@Router1#  commit  
commit complete

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