Displaying inbound FEC filter information

Displaying the prefix list and filtered information

To display the prefix list and filtered information, use the show mpls ldp fec prefix prefix-filter command. In the following example, the downstream mapping for the inbound FECs is filtered by the inbound-FEC filter prefix list and is displayed as a retained state. The output displays that it is retained due to the inbound FEC-filter action.

device# show mpls ldp fec prefix prefix-filter 172.16.8.0/24
FEC_CB: 0x2cd83d78, idx: 4, type: 2, pend_notif: None, fec_definition:22080000
 State: current, Ingr: Yes, Egr: No, UM Dist. done: Yes
 Prefix: 172.16.8.0/24
 next_hop: 10.55.55.14, out_if: e3/16

 Downstream mappings:
 Local LDP ID	 Peer LDP ID	  Label	State	       CB
 10.44.44.44:0	10.14.14.14:0	1024	 Retained (f)	0x2cd3b610(-1)

Displaying the filtered information

To display the filtered information, use the show mpls ldp fec prefix filtered command.

device# show mpls ldp fec prefix filtered
Total number of prefix FECs: 1607
Total number of prefix FECs installed: 1505
Total number of prefix FECs filtered(in/out): 0/0
Total number of prefix FECs with LWD timer running: 0

Destination         State    Out-intf         Next-hop        Ingress Egress Filtered LWD
10.44.44.44/32	    current  --	              --              No      Yes
10.66.66.66/32	    current  Eth 4/2          10.1.1.2        Yes     No
10.14.14.14/32	    current  Eth 3/16         10.55.55.14     Yes     No

Displaying the label database for the filtered mapped sessions

To display the label database for the sessions when there is at least one mapping which is filtered due to the FEC-filter filter action, use the show mpls ldp database command. In the following example, the inbound FECs filtered by the inbound-FEC filter prefix list are displayed as a retained state.

device# show mpls ldp database
Session 10.44.44.44:0 - 10.14.14.14:0
 Downstream label database:	
   Label      Prefix            State
   3          10.14.14.14/32    Installed
   1024	      172.16.8.0/24     Retained(filtered)
   1025	      172.16.16.0/24    Retained(filtered)
   1026	      172.16.32.0/24    Retained(filtered)
   1027	      172.16.64.0/24    Retained(filtered)
   1028	      172.16.8.0/28     Retained(filtered)
   1029	      172.16.8.16/28    Retained(filtered)
   1030	      172.16.8.32/28    Retained(filtered)
   1031	      172.16.8.64/28    Retained(filtered)
Upstream label database: Label	Prefix
       3        10.44.44.44/32
       1024     10.66.66.66/32
     Session 10.44.44.44:0 - 10.66.66.66:0
Downstream label database:
       Label    Prefix          State
       3        10.66.66.66/32  Installed
Upstream label database: Label  Prefix
       3        10.44.44.44/32
       1025     10.14.14.14/32

Displaying the number of FECs from the filtered peer

To display the number of FECs from the peer which are filtered due to the inbound FEC filter configuration, use the show mpls ldp session detail command.

device# show mpls ldp session detail
Number of link LDP sessions: 1
Number of Operational link LDP sessions: 1
Number of targeted LDP sessions: 0
Number of Operational targeted LDP sessions: 0

Peer LDP ID: 10.66.66.66:0, Local LDP ID: 10.44.44.44:0, State: Operational 
  Adj: Link, Role: Passive, Next keepalive: 2 sec, Hold time left: 32 sec 
  Keepalive interval: 6 sec, Max hold time: 36 sec
  Configured keepalive timeout: 36 sec 
  Peer proposed keepalive timeout: 36 sec 
  Up time: 21 sec
  TCP connection: 10.44.44.44:646--10.66.66.66:9075, State: ESTABLISHED 
  Neighboring interfaces: Eth 4/2
  Next-hop addresses received from the peer:7
  10.1.1.2 10.66.66.66 10.168.1.1 10.168.1.2 10.168.1.3 10.168.1.4	10.168.1.5
  IGP Sync:
    Unrecognized Notification Capability: Local: Off, Remote: Off
    Local State: In-sync, RemoteState: -
    Rx label silence time: 1000 ms, Timer not running
  Graceful restart: enabled
  Number of FECs Received from peer: 18
  Number of FECs installed from peer: 5
  Number of FECs filtered from peer(in/out): 1/0