Differences between Stack 100G and Data Link 100G Modes on ICX 7550 Devices
In default stack-100g mode, the x/2/1 and x/2/2 ports are each composed of 2 X 50-Gbps ports.
The output from the show stack connection
command indicates that the x/2/1 port is, in fact, two ports: x/2/1 and
x/2/1#2.
ICX7550-24ZP Router# show stack connection
Probing the topology. Please wait ...
ICX7550-24ZP Router#
active standby
+---+ +---+
-2/2| 1 |2/1--2/1| 2 |2/2-
| +---+ +---+ |
| |
|------------------------|
probe results: 2 links, P0/1: stk-port dir 0/1, T0/1: stack-trunk dir 0/1
NOTE: A 100G port has two 50G ports: x/y/z and x/y/z#2. <---
Link 1: u1 -- u2, num=2
1: 1/2/1 (P0) <---> 2/2/1 (P0)
2: 1/2/1#2 (P0) <---> 2/2/1#2 (P0) <---
Link 2: u1 -- u2, num=2
1: 1/2/2 (P1) <---> 2/2/2 (P1)
2: 1/2/2#2 (P1) <---> 2/2/2#2 (P1) <---
CPU to CPU packets are fine between 2 units.
ICX7550-24ZP Router# show stack stack-ports
active standby
+---+ +---+
-2/2| 1 |2/1--2/1| 2 |2/2-
| +---+ +---+ |
| |
|------------------------|
U# Stack-port1 Stack-port2
1 up 1/2/1 up 1/2/2
up ports: 1/2/1, 1/2/1#2 (#2: 2nd port of 2x50G=100G) <---
up ports: 1/2/2, 1/2/2#2 (#2: 2nd port of 2x50G=100G) <---
2 up 2/2/1 up 2/2/2
up ports: 2/2/1
up ports: 2/2/2
ICX7550-24ZP Router# show stack
T=12h21m1.4: alone: standalone, D: dynamic cfg, S: static
ID Type Role Mac Address Pri State Comment
1 S ICX7550-24ZP active c803.f53a.8322 128 local Ready
2 S ICX7550-48ZP standby 28b3.7129.8856 0 remote Ready
active standby
+---+ +---+
-2/2| 1 |2/1--2/1| 2 |2/2-
| +---+ +---+ |
| |
|------------------------|
Standby u2 - protocols ready, can failover
Current stack management MAC is c803.f53a.8322
slot 2: config = oper = stack-40g/100g
All UP stack ports operate at 100G
In default stack-100g mode, ports x/2/1 and x/2/2 can be used as data ports if 'stack enable' or 'stack-port' is not configured on the ICX device. The ports can link to other 2 X 50-Gbps data ports on another ICX 7550 device that is operating in default stacking mode. The ports cannot link to standard 100-Gbps ports.
When an ICX 7550 device is operating in data uplink mode, ports x/2/1 and x/2/2 serve as standard 100-Gbps ports that can link to standard 100-Gbps ports on any platform from any vendor.