show l2circuit connections

Layer-2 Circuit Connections

Displays the legends for connection and interface status.

Neighbor

Remote PE neighbor.

Interface

Logical PE-to-CE interface on which the VC is configured.

Type

VC type: rmt (remote) or loc (local).

Legend for connection status (St)

Status of the VC connection:

• EI—The local VC interface is configured with an encapsulation that is not supported.
• MM—The two routers do not agree on an MTU value, which causes an MTU mismatch.
• EM—The encapsulation type received on this VC from the neighbor does not match the local VC interface encapsulation type.
• CM—The two routers do not agree on a control word, which causes a control word mismatch.
• VM—The remote and local VLAN IDs do not match across the Layer 2 circuit.
• OL—No advertisement has been received for this VC from the neighbor. There is no outgoing label available for use by this VC.
• NC—The interface is not configured as a CCC or TCC interface.
• BK—The VC has switched to a backup connection.
• CB—The remote PE router is advertising a different cell bundle from that configured on the local PE router.
• LD—The connection to the local site is signaled down, because the CE-facing interface to the local site is down.
• RD—The remote neighbor is down. It has signaled a problem using the pseudowire status code.
• NP—The router detects that interface hardware is not present. The hardware may be offline, a PIC may not be of the desired type, or the interface may be configured in a different routing instance.
• Dn—The VC is down..
• VC-Dn—The VC is down because there is no tunnel LSP from the local PE router to the neighbor.
• UP—The VC is operational.
• CF—The router cannot find enough bandwidth to the remote router to satisfy the Layer 2 circuit bandwidth requirement.
• IB—The bitrate is incompatible for Time Division Multiplexing (TDM).
• TDM—TDM is not configured correctly.
• ST—The VC has been switched to a standby connection.
• SP—The VC connection is using a static pseudowire.
• RS—The remote site is in a standby state.
• XX—The VC is down for an unknown reason. This is a programming error.

Time last up

Date and time the VC was last operational.

# Up trans

Number of times the VC came up.

local-interface-name

Name of the local PE-to-CE interface.

Status

Status of the local interface.

Up

Interface is operational.

Dn

Interface is not operational.

NP

Not present. Interface does not exist.

DS

Disabled. Interface has been administratively disabled.

WE

Wrong encapsulation. The interface is not configured as CCC.

UN

Interface status is initialized.

Encapsulation

Encapsulation of the local interface.

Remote PE

Prefix of the remote PE router.

Negotiated control-word

Whether the use of the control word has been negotiated for this VC: Yes (Null) or No.

Incoming label

Label used by the remote side of the VC to send packets destined to the local side. This label is routed to the local VC interface.

Outgoing label

Label used by the local side of the VC to send packets to the remote side of the VC. Packets originated on the local VC interface are encapsulated with this label before being placed on the tunnel LSP to the neighbor for this VC. This label is allocated by the neighbor and is used in demultiplexing incoming packets destined for this VC.

Negotiated PW-status-TLV

Displays the pseudowire status Type, Length, and Value (TLV). TLVs are a method of encoding variable-length and/or optional information . If the pseudowire status TLV is used, the corresponding local or neighbor PE router status code is also displayed.

Local status code

If the pseudowire status TLV is used, displays the local PE router status code.

Neighbor status code

If the pseudowire status TLV is used, displays the neighbor PE router status code.

VC bandwidth

Bandwidth requirement of the Layer 2 circuit.

Time

Time at which the event occurred.

Event

Event types logged in history.

• loc intf up—Local VC interface went up.
• loc intf down—Local VC interface went down.
• In lbl Update—Incoming label has been updated.
• Out lbl Update—Outgoing label has been updated.
• PE route changed—Route to PE router has been updated.
• PE route down—Route to PE router is down.
• rmt side marked—Remote side is marked.
• VC Dn—Remote side indicated that its end of the VC is down (if the tunnel LSP from the remote side to the local side is down).
• status update timer—Status update timer processing. It computes the state of the VC, and determines whether it should be advertised or withdrawn to or from the remote side.

Interface/Lbl/PE

Name associated with an event. It can be the name of the interface, the name of the new label, or if the route to a PE router changed, the name of the PE router that went down.

(vc-number)

Unique number (between 1 and 2³²– 1) that identifies the VC configured between two PE routers, but not across the entire network. A VC identifier in conjunction with a neighbor address uniquely identifies the VC.