Description

This article provides information about the PFH interface.

Symptoms

There is a PFH interface for each line card: 

lab@Kamas-re0> show interfaces terse pfh*           
Interface               Admin Link Proto    Local                 Remote
pfh-0/0/0               up    up  
pfh-0/0/0.16383         up    up   inet    
pfh-1/0/0               up    up  
pfh-1/0/0.16383         up    up   inet    
pfh-2/0/0               up    up  
pfh-2/0/0.16383         up    up   inet    
pfh-4/0/0               up    up  
pfh-4/0/0.16383         up    up   inet    
pfh-5/0/0               up    up  
pfh-5/0/0.16383         up    up   inet

lab@Kamas-re0> show chassis hardware | match fpc 
FPC 0            REV 28   750-031090   YH8100            MPC Type 2 3D EQ
FPC 1            REV 26   750-028467   ABBF8900          MPC 3D 16x 10GE
FPC 2            REV 08   750-024387   JW9900            MX FPC Type 2
FPC 4            REV 13   750-024064   ZN4900            MS-DPC
FPC 5            REV 13   750-024064   ZN4900            MS-DPC

Solution


PFH interfaces are pseudo/virtual interfaces, which represent the PFE Host Processor (the processor hosting the PFE, which is usually the FPC for distributed routers and the SCB/SSB/SFM boards for old single-PFE or centralized forwarding routers). It is used for intra-chassis communication and is not user-configurable.