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The proposed control is tied to the service has an inappropriate ethertype filter or nontransparent encapsulation, typically observed when iPv6 frames fail while ordinary IPv4 packets cross the same circuit. Here the target is vlan tagging and pseudowire encapsulation semantics differ at the endpoints; monitor remote captures preserve the contracted customer VLAN header.

This gate monitors a different failure, mac movement and broadcast storms appear after both ce ports activate. It would not detect the current problem: Customer tags disappear at the remote CE port. The appropriate check requires remote captures preserve the contracted customer VLAN header.

It is valid for another service scenario but checks the circuit stays down because no vc label is negotiated. This case instead needs a gate for customer tags disappear at the remote ce port and evidence that remote captures preserve the contracted customer VLAN header.

This remediates qinq tag handling differs between ingress and remote attachment circuits, normally indicated by Only the outer service VLAN survives and nested customer tags are lost. It would leave the observed problem (The circuit stays Down because no VC label is negotiated) unresolved. Address it with repair targeted LDP peering and the configured circuit neighbor relationship.

This change belongs to a different Layer 2 VPNs issue: The near-end L2 circuit is Up but remote customer frames do not return. That issue involves a remote attachment circuit is mapped to the wrong customer interface. The current symptom is The circuit stays Down because no VC label is negotiated. It instead requires repair targeted LDP peering and the configured circuit neighbor relationship.

The option may be useful when a PE cannot find the other site's pseudowire although the underlay path is healthy, but that is not the current evidence. Here, the circuit stays Down because no VC label is negotiated, indicating the pes do not establish the required targeted ldp signaling for the remote endpoint. The targeted action is Repair targeted LDP peering and the configured circuit neighbor relationship.

This result is useful in another case with evidence Only the outer service VLAN survives and nested customer tags are lost. It does not test recovery from the circuit stays down because no vc label is negotiated. Check instead whether both ends exchange VC labels and the pseudowire becomes operational.

That observation would verify a separate fault involving vpls signaling or targeted ldp sessions are missing between pes. Its symptom is A PE cannot find the other site's pseudowire although the underlay path is healthy. For this case the actual issue is the pes do not establish the required targeted ldp signaling for the remote endpoint, and the relevant success signal is Both ends exchange VC labels and the pseudowire becomes operational.

It confirms an unrelated service correction: A remote attachment circuit is mapped to the wrong customer interface. The present case reports The circuit stays Down because no VC label is negotiated. Its completion test is Both ends exchange VC labels and the pseudowire becomes operational.

That explanation fits another condition: Only the outer service VLAN survives and nested customer tags are lost. The evidence here is The circuit stays Down because no VC label is negotiated. Its closer root cause is The PEs do not establish the required targeted LDP signaling for the remote endpoint.

A remote attachment circuit is mapped to the wrong customer interface. would normally be accompanied by the near-end l2 circuit is up but remote customer frames do not return. The observed symptom is different: The circuit stays Down because no VC label is negotiated. The likely cause is The PEs do not establish the required targeted LDP signaling for the remote endpoint.

The stated cause is possible elsewhere but explains a pe cannot find the other site's pseudowire although the underlay path is healthy, not the circuit stays down because no vc label is negotiated. This incident is better attributed to the pes do not establish the required targeted ldp signaling for the remote endpoint.

This gate monitors a different failure, the near-end l2 circuit is up but remote customer frames do not return. It would not detect the current problem: The circuit stays Down because no VC label is negotiated. The appropriate check requires both ends exchange VC labels and the pseudowire becomes operational.

It is valid for another service scenario but checks only the outer service vlan survives and nested customer tags are lost. This case instead needs a gate for the circuit stays down because no vc label is negotiated and evidence that both ends exchange VC labels and the pseudowire becomes operational.

The proposed control is tied to vpls signaling or targeted ldp sessions are missing between pes, typically observed when a PE cannot find the other site's pseudowire although the underlay path is healthy. Here the target is the pes do not establish the required targeted ldp signaling for the remote endpoint; monitor both ends exchange VC labels and the pseudowire becomes operational.

This change belongs to a different Layer 2 VPNs issue: One PE advertises a MAC route but no corresponding service label is usable. That issue involves evpn mpls service-label mapping is missing or mismatched across control and forwarding planes. The current symptom is The near-end L2 circuit is Up but remote customer frames do not return. It instead requires correct the remote attachment circuit interface mapping for the VC.

The option may be useful when data is discarded because the ingress and egress service framing differ, but that is not the current evidence. Here, the near-end L2 circuit is Up but remote customer frames do not return, indicating a remote attachment circuit is mapped to the wrong customer interface. The targeted action is Correct the remote attachment circuit interface mapping for the VC.

This remediates flooding and mac learning behavior were not accounted for as the broadcast domain grew, normally indicated by Broadcast and unknown-unicast replication overloads the service. It would leave the observed problem (The near-end L2 circuit is Up but remote customer frames do not return) unresolved. Address it with correct the remote attachment circuit interface mapping for the VC.

This result is useful in another case with evidence Broadcast and unknown-unicast replication overloads the service. It does not test recovery from the near-end l2 circuit is up but remote customer frames do not return. Check instead whether end-to-end unicast test traffic reaches only the intended customer port.

That observation would verify a separate fault involving layer 2 interworking and payload encapsulation expectations are incompatible. Its symptom is Data is discarded because the ingress and egress service framing differ. For this case the actual issue is a remote attachment circuit is mapped to the wrong customer interface, and the relevant success signal is End-to-end unicast test traffic reaches only the intended customer port.

It confirms an unrelated service correction: EVPN MPLS service-label mapping is missing or mismatched across control and forwarding planes. The present case reports The near-end L2 circuit is Up but remote customer frames do not return. Its completion test is End-to-end unicast test traffic reaches only the intended customer port.

The stated cause is possible elsewhere but explains data is discarded because the ingress and egress service framing differ, not the near-end l2 circuit is up but remote customer frames do not return. This incident is better attributed to a remote attachment circuit is mapped to the wrong customer interface.

That explanation fits another condition: Broadcast and unknown-unicast replication overloads the service. The evidence here is The near-end L2 circuit is Up but remote customer frames do not return. Its closer root cause is A remote attachment circuit is mapped to the wrong customer interface.

EVPN MPLS service-label mapping is missing or mismatched across control and forwarding planes. would normally be accompanied by one pe advertises a mac route but no corresponding service label is usable. The observed symptom is different: The near-end L2 circuit is Up but remote customer frames do not return. The likely cause is A remote attachment circuit is mapped to the wrong customer interface.

This gate monitors a different failure, one pe advertises a mac route but no corresponding service label is usable. It would not detect the current problem: The near-end L2 circuit is Up but remote customer frames do not return. The appropriate check requires end-to-end unicast test traffic reaches only the intended customer port.

The proposed control is tied to layer 2 interworking and payload encapsulation expectations are incompatible, typically observed when data is discarded because the ingress and egress service framing differ. Here the target is a remote attachment circuit is mapped to the wrong customer interface; monitor end-to-end unicast test traffic reaches only the intended customer port.

It is valid for another service scenario but checks broadcast and unknown-unicast replication overloads the service. This case instead needs a gate for the near-end l2 circuit is up but remote customer frames do not return and evidence that end-to-end unicast test traffic reaches only the intended customer port.

This remediates import route targets do not include the originating l2vpn service, normally indicated by One remote PE receives BGP routes but does not establish the required connection. It would leave the observed problem (Data is discarded because the ingress and egress service framing differ) unresolved. Address it with select a supported interworking mode and align encapsulation on both PEs.

The option may be useful when one CE continues forwarding to a moved MAC on a stale port, but that is not the current evidence. Here, data is discarded because the ingress and egress service framing differ, indicating layer 2 interworking and payload encapsulation expectations are incompatible. The targeted action is Select a supported interworking mode and align encapsulation on both PEs.

This change belongs to a different Layer 2 VPNs issue: The remote PE never learns the MAC although EVPN BGP neighbors are Established. That issue involves mac/ip route type 2 advertisement or its route-target import is missing. The current symptom is Data is discarded because the ingress and egress service framing differ. It instead requires select a supported interworking mode and align encapsulation on both PEs.

That observation would verify a separate fault involving mac aging and control-plane refresh behavior conflict with the active service topology. Its symptom is One CE continues forwarding to a moved MAC on a stale port. For this case the actual issue is layer 2 interworking and payload encapsulation expectations are incompatible, and the relevant success signal is Test frames cross with correct service framing and no unexpected protocol drops.

This result is useful in another case with evidence One remote PE receives BGP routes but does not establish the required connection. It does not test recovery from data is discarded because the ingress and egress service framing differ. Check instead whether test frames cross with correct service framing and no unexpected protocol drops.

It confirms an unrelated service correction: MAC/IP route type 2 advertisement or its route-target import is missing. The present case reports Data is discarded because the ingress and egress service framing differ. Its completion test is Test frames cross with correct service framing and no unexpected protocol drops.