Configuring Interop Mode 1 - Cisco Nexus 5000 Series Configuration Manual

Advanced Fibre Channel Features and Concepts

Configuring Interop Mode 1

The interop mode1 in Cisco Nexus 5000 Series switches can be enabled disruptively or nondisruptively.
Note Brocade's msplmgmtdeactivate command must explicitly be run prior to connecting from a Brocade
switch to either Cisco Nexus 5000 Series switches or to McData switches. This command uses Brocade
proprietary frames to exchange platform information, which Cisco Nexus 5000 Series switches or McData
switches do not understand. Rejecting these frames causes the common E ports to become isolated.
To configure interop mode 1 in any switch in the Cisco Nexus 5000 Series, perform this task:
SUMMARY STEPS
1. Place the VSAN of the E ports that connect to the OEM switch in interoperability mode.
2. Assign a domain ID in the range of 97 (0x61) through 127 (0x7F).
3. Change the Fibre Channel timers (if they have been changed from the system defaults).
4. When making changes to the domain, you may or may not need to restart the domain manager function
for the altered VSAN.
DETAILED STEPS
Step 1
Place the VSAN of the E ports that connect to the OEM switch in interoperability mode.
switch# configuration terminal
switch(config)# vsan database
switch(config-vsan-db)# vsan 1 interop 1
switch(config-vsan-db)# exit
Step 2 Assign a domain ID in the range of 97 (0x61) through 127 (0x7F).
Note This is an limitation imposed by the McData
switches.
In Cisco Nexus 5000 Series switches, the default is to request an ID from the principal switch. If the preferred option is
used, Cisco Nexus 5000 Series switches request a specific ID, but still join the fabric if the principal switch assigns a
different ID. If the static option is used, the Cisco Nexus 5000 Series switches do not join the fabric unless the principal
switch agrees and assigns the requested ID.
When changing the domain ID, the FC IDs assigned to N ports also
Note
change.
Step 3
Change the Fibre Channel timers (if they have been changed from the system defaults).
The Cisco Nexus 5000 Series, Brocade, and McData FC Error Detect (ED_TOV) and Resource Allocation
Note
(RA_TOV) timers default to the same values. They can be changed if needed. The RA_TOV default is 10
seconds, and the ED_TOV default is 2 seconds. Per the FC-SW2 standard, these values must be the same on
each switch within the fabric.
switch(config)# fctimer e_d_tov ?
<1000-100000> E_D_TOV in milliseconds(1000-100000)
switch(config)# fctimer r_a_tov ?
<5000-100000> R_A_TOV in milliseconds(5000-100000)
OL-xxxxx-xx
Cisco Nexus 5000 Series NX-OS SAN Switching Configuration Guide
Switch Interoperability
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