Changing The Number Of Links - Cisco nexus 5000 series Configuration Manual

Changing the Number of Links

Changing the Number of Links
If you initially configured a specific port on the parent switch, for example port 33, as your only fabric interface,
all 48 host interfaces are pinned to this port. If you provision another port, for example 35, 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 24 are pinned to fabric interface 33 and host interfaces 25 to 48 are pinned to
fabric interface 35.
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# show interface ethernet 1/35 fex-intf
Fabric
Interface
---------------------------------------------------
Eth1/35
switch# show interface ethernet 1/33 fex-intf
Fabric
Interface
---------------------------------------------------
Eth1/33
switch# show interface ethernet 1/38 fex-intf
Fabric
Interface
---------------------------------------------------
Eth1/38
switch# show interface ethernet 1/40 fex-intf
Fabric
Interface
---------------------------------------------------
Eth1/40
The next time that you reboot the Fabric Extender, the configured fabric interfaces are pinned to the host
interfaces in an ascending order by port number of the fabric interface. If you want to configure the same
fixed distribution of host interfaces without restarting the Fabric Extender, enter the fex pinning redistribute
command.
Redistributing Host Interfaces
This command disrupts all the host interface ports of the Fabric Extender.
Caution
Cisco Nexus 5000 Series NX-OS Layer 2 Switching Configuration Guide, Release 5.1(3)N1(1)
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FEX
Interfaces
Eth101/1/12 Eth101/1/11
Eth101/1/8 Eth101/1/7
Eth101/1/4 Eth101/1/3
FEX
Interfaces
Eth101/1/24 Eth101/1/23
Eth101/1/20 Eth101/1/19
Eth101/1/16 Eth101/1/15
FEX
Interfaces
Eth101/1/36 Eth101/1/35
Eth101/1/32 Eth101/1/31
Eth101/1/28 Eth101/1/27
FEX
Interfaces
Eth101/1/48 Eth101/1/47
Eth101/1/44 Eth101/1/43
Eth101/1/40 Eth101/1/39
Configuring the Fabric Extender
Eth101/1/10 Eth101/1/9
Eth101/1/6 Eth101/1/5
Eth101/1/2 Eth101/1/1
Eth101/1/22 Eth101/1/21
Eth101/1/18 Eth101/1/17
Eth101/1/14 Eth101/1/13
Eth101/1/34 Eth101/1/33
Eth101/1/30 Eth101/1/29
Eth101/1/26 Eth101/1/25
Eth101/1/46 Eth101/1/45
Eth101/1/42 Eth101/1/41
Eth101/1/38 Eth101/1/37
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