FCoE Cookbook for HP Virtual Connect Version 4.20 Firmware Enhancements May 2014

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Appendix A: FCoE Port Channel limitations on Nexus switches
There is currently an NX-OS limitation with FCoE Port Channels on Cisco Nexus 5000 and 5500 series. When a Port
Channel is carrying FCoE traffic, all interfaces of this port channel must belong to the same Nexus Unified Port Controller
(UPC) ASIC. At this time, it is not supported to configure a FCoE port channel across different Unified Port Controllers.
This limitation will be removed in a future NX software release.
As a result, we have the following limitations:
 Nexus 5010/5020 switches can support a maximum of four ports per port-channel when carrying FCoE traffic.
 Nexus 5548/5596 switches can support a maximum of eight ports per port-channel when carrying FCoE traffic.
Identifying ports that belong to the same Nexus Unified Port Controller
It is necessary while configuring the FCoE port channel group between Virtual Connect modules and Nexus switches to
identify ports that belong to same Unified Port Controller (e.g. Eth1/5 and Eth1/6 because both interfaces are mapped to
the same ASIC, UPC#1) by using the show hardware internal command .
On Nexus 5010/5020 switches:
The Nexus 5010 and 5020 switches use Gatos Unified Port Controller ASIC (UPC Gen 1). Each UPC ASIC have 4 ports
mapped to front panel ports. This can be seen with the following command:
Nexus-5010# show hardware internal gatos all-ports
Gatos Port Info:
name |log|gat|mac|flag|adm|opr|c:m:s:l|ipt|fab|xgat|xpt|if_index|diag
-------+---+---+---+----+---+---+-------+---+---+----+---+--------+----
xgb1/4 |3 |0 |0 |b7 |dis|dn |0:0:0:f|0 |55 |0 |2 |1a003000|pass
xgb1/3 |2 |0 |1 |b7 |dis|dn |0:1:1:f|1 |54 |0 |0 |1a002000|pass
xgb1/1 |0 |0 |2 |b7 |dis|dn |1:2:2:f|2 |56 |0 |4 |1a000000|pass
xgb1/2 |1 |0 |3 |b7 |en |up |1:3:3:f|3 |57 |0 |6 |1a001000|pass
xgb1/8 |7 |1 |0 |b7 |en |up |0:0:0:f|0 |50 |1 |2 |1a007000|pass
xgb1/7 |6 |1 |1 |b7 |dis|dn |0:1:1:f|1 |51 |1 |0 |1a006000|pass
xgb1/5 |4 |1 |2 |b7 |en |up |1:2:2:f|2 |53 |1 |4 |1a004000|pass
xgb1/6 |5 |1 |3 |b7 |en |up |1:3:3:f|3 |52 |1 |6 |1a005000|pass
xgb1/19|18 |2 |0 |b7 |en |up |0:0:0:f|0 |45 |4 |0 |1a012000|pass
xgb1/11|10 |2 |1 |b7 |dis|dn |0:1:1:f|1 |44 |2 |0 |1a00a000|pass
xgb1/20|19 |2 |2 |b7 |en |up |1:2:2:f|2 |49 |4 |2 |1a013000|pass
xgb1/12|11 |2 |3 |b7 |dis|dn |1:3:3:f|3 |48 |2 |2 |1a00b000|pass
xgb1/18|17 |3 |0 |b7 |dis|dn |0:0:0:f|0 |41 |4 |6 |1a011000|pass
xgb1/10|9 |3 |1 |b7 |en |dn |0:1:1:f|1 |40 |2 |6 |1a009000|pass
xgb1/17|16 |3 |2 |b7 |en |up |1:2:2:f|2 |46 |4 |4 |1a010000|pass
xgb1/9 |8 |3 |3 |b7 |dis|dn |1:3:3:f|3 |47 |2 |4 |1a008000|pass
…
Note: Column 1- Indicates the physical ports e.g., Eth1/1, Eth1/3, Eth1/9, Eth1/17, etc.
Column 3- Indicates the UPC ASIC number.
Column 4- Indicates the UPC ASIC interface number. 0-3 are the 4 port available on the Gen-1 ASIC.
Note: Only ports identified as mapped to the same UPC ASIC can be member of the same port channel. For example,
Eth1/1 to Eth1/4 can be used in the same port channel because they are all mapped to UPC#0.