HP Integrity Superdome 2 8-socket Cisco Nexus B22 Fabric Extender for HP Getti - Page 11

Configuring the Cisco Nexus B22 Fabric Extender for HP Caution Changing the number of uplinks with the pinning max-links command or the no pinning max-links command disrupts all the host interface ports of the Fabric Extender. Redistributing the Links When you provision the Fabric Extender with statically pinned interfaces, the downlink host interfaces on the Fabric Extender are pinned to the fabric interfaces in the order they were initially configured. If you want to maintain a specific relationship of host interfaces to fabric interface across reboots, you should re-pin the links. You may want to perform this function in these two situations: • A change in the max-links configuration. • If you need to maintain the pinning order of host interfaces to fabric interfaces. Changing the Number of Links If you initially configured port 19 on the parent switch as your only fabric interface, all 16 host interfaces are pinned to this port. If you provision another port, for example 20, then you must enter the pinning max-links 2 command to redistribute the host interfaces. All host interfaces are brought down and host interfaces 1 to 8 are pinned to fabric interface 19 and host interfaces 9 to 16 are pinned to fabric interface 20. Maintaining the Pinning Order The pinning order of the host interfaces is initially determined by the order in which the fabric interfaces were configured. In this example, four fabric interfaces were configured in the following order: switch(config-fex)# switch(config-fex)# switch(config-fex)# show interface ethernet 1/19 fex-intf Fabric FEX Interface Interfaces Eth1/19 Eth100/1/4 Eth100/1/3 Eth100/1/2 Eth100/1/1 switch(config-fex)# show interface ethernet 1/20 fex-intf Fabric FEX Interface Interfaces Eth1/20 Eth100/1/8 Eth100/1/7 Eth100/1/6 Eth100/1/5 switch(config-fex)# show interface ethernet 1/21 fex-intf Fabric FEX Interface Interfaces Eth1/21 Eth100/1/12 Eth100/1/11 Eth100/1/10 Eth100/1/9 switch(config-fex)# show interface ethernet 1/22 fex-intf Fabric FEX Interface Interfaces Eth1/22 Eth100/1/16 Eth100/1/15 Eth100/1/14 Eth100/1/13 Cisco Nexus B22 Fabric Extender for HP Getting Started Guide 11