Cisco N5K-C5010P-BF Troubleshooting Guide - Page 33
CNA, Best practice topology for CNA
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Chapter 2 Troubleshooting FCoE Issues CNA Send document comments to [email protected]. FKA timeout : 2.4 * FKA_adv_period. The FKA_adv_period is exchanged and agreed upon with the host as in the FIP advertisement when responding to a solicitation. Observe the output from the following commands to confirm FKA misses: • show platform software fcoe_mgr info interface vfc • show platform software fcoe_mgr event-history errors • show platform software fcoe_mgr event-history lock • show platform software fcoe_mgr event-history msgs • show platform fwm info pif ethernet Solution Sometimes when congestion is relieved, the VFC comes back up. If the symptom persists, then additional analysis is required. The possible considerations are: • The host stopped sending the FKA. • The switch dropped the FKA that was received. CNA This section includes an overview of best practices for the topology of the Converged Network Adapter (CNA), a description of troubleshooting with host-based tools, followed by a description of common problems and their solutions. Best practice topology for CNA Best Practice Topology for Direct Connected CNA • A unique dedicated VLAN must be configured at every converged access switch to carry traffic for each virtual fabric (VSAN) in the SAN (for example, VLAN 1002 for VSAN 1, VLAN 1003 for VSAN 2, and so on). If MSTP is enabled, a separate MST instance must be used for FCoE VLANs • Unified Fabric (UF) links must be configured as trunk ports. FCoE VLAN must not be configured as a native VLAN. All FCoE VLANs must be configured as members of the UF links. This allows it to be extendible for VF_Port trunking and VSAN management for the VFC interfaces. • UF links must be configured as spanning tree edge ports. • FCoE VLANs must not be configured as members of Ethernet links that are not designated to carry FCoE traffic. This ensures to limit the scope of the spanning-tree protocol for FCoE VLANs to UF links only. • If the converged access switches (in the same SAN fabric or in the other) need to be connected to each over Ethernet links for the purposes of LAN alternate pathing, then such links must explicitly be configured to exclude all FCoE VLANs from membership. This ensures to limit the scope of the Spanning Tree Protocol for FCoE VLANs to UF links only. • Separate FCoE VLANs must be used for FCoE in SAN-A and SAN-B. OL-25300-01 Cisco Nexus 5000 Series Troubleshooting Guide 2-9
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