ICX 7250 Trunk Configuration

When a 10G-port license is installed, two stacking trunks containing two ports each can be configured on each ICX 7250 unit.

Stacked trunks can be formed using the following port combinations:

  • Stack ports 1/2/1 and 1/2/2
  • Stack ports 1/2/3 and 1/2/4
  • Stack ports 1/2/5 and 1/2/6
  • Stack ports 1/2/7 and 1/2/8

Two-unit linear-topology trunks can be formed using the following port combinations:

  • Stack ports 1/2/1 to 1/2/4
  • Stack ports 1/2/5 to 1/2/8
Refer to Configuring Two-unit Stack Linear-topology Trunks for more information.

The following example designates ports 1/2/1 and 1/2/3 as the valid-stack-port set to be used and creates two trunks. 

ICX7250-24P Router(config)# stack unit 1
ICX7250-24P Router(config-unit-1)# stack-trunk ethernet 1/2/1 to 1/2/2
ICX7250-24P Router(config-unit-1)# stack-trunk ethernet 1/2/3 to 1/2/4

The following example uses the other valid-stack-port set (1/2/5, 1/2/7). 

ICX7250-24P Router(config)# stack unit 1
ICX7250-24P Router(config-unit-1)# stack-trunk ethernet 1/2/5 to 1/2/6
ICX7250-24P Router(config-unit-1)# stack-trunk ethernet 1/2/7 to 1/2/8

The following example creates a linear-topology trunk containing ports 1/2/1 through 1/2/4: 

ICX7250-24P Router(config)# stack unit 1
ICX7250-24P Router(config-unit-1)# stack-trunk ethernet 1/2/1 to 1/2/4

The following example creates a linear-topology trunk containing ports 1/2/5 through 1/2/8: 

ICX7250-24P Router(config)# stack unit 1
ICX7250-24P Router(config-unit-1)# stack-trunk ethernet 1/2/5 to 1/2/8

Creating ICX 7250 Trunks in a Production Environment

The stack-trunk command cannot be used in a live environment. Instead, use the multi-stack-trunk command to configure both ends of a trunk simultaneously.

The following example creates a multi-stack-trunk cross-cabled connection between unit 1 and unit 2 on ports 1/2/7 through 1/2/8 and ports 2/2/5 through 2/2/6. 

ICX7250-48 Router(config-unit-1)# multi-stack-trunk ethernet 1/2/7 to 1/2/8 and ethernet 2/2/5 to 2/2/6

ICX7250-48 Router(config-unit-1)# show stack
T=15d23h18m0.7: alone: standalone, D: dynamic cfg, S: static
ID   Type          Role    Mac Address    Pri State   Comment                   
1  S ICX7250-48    active  cc4e.24b4.23e8   0 local   Ready
2  S ICX7250-24P   member  cc4e.24b4.8aa8   0 remote  Ready
3  S ICX7250-24    standby cc4e.24b4.8cc4   0 remote  Ready
4  S ICX7250-48P   member  cc4e.24b4.2d84   0 remote  Ready

    active                                 standby                             
     +---+        +---+        +---+        +---+                              
 =2/5| 1 |2/7==2/5| 2 |2/7--2/5| 4 |2/7--2/5| 3 |2/7=                          
 |   +---+        +---+        +---+        +---+   |                          
 |                                                  |                          
 |--------------------------------------------------|                         
Standby u3 - protocols ready, can failover or manually switch over
Current stack management MAC is cc4e.24b4.23e8

The double lines between unit 1 and unit 2 in the previous output indicate a trunk connection with two ports from each unit.