09-11-2013 03:31 AM
Max is 30Km using ER optics and 10Km for LR.
Extract is from Network OS Administrator Guide 3.0.1 and same is true for 3.0.0
Long distance ISL guidelines and restrictions
Consider the following when configuring long distance ISL:
• Long distance ISL is only supported on 10G interfaces.
• Edge ports can not be configured with DCB maps.
• Edge ports and port groups with long distance links can not use the fcoeport default command.
• A maximum of three PFCs can be supported on a long distance ISL configured platform. By default, PFC is enabled by class 3 and 7.
• All the ports on the platform are rebooted when configuring a port for long-distance.
• For 2Km, 5Km, 10Km long-distance, use Brocade-supported long range (LR) optics for direct connectivity.
• For 30Km long-distance, use Brocade-supported extended range (ER) optics for direct connectivity.
To configure a long distance ISL port, use the long-distance-isl command in interface configuration mode. Refer to theNetwork OS Command Reference for complete details. The following example sets port 1/0/2 to support long distance ISL up to 30Km.
switch(conf-if-te-1/0/2)# long-distance-isl 30000
09-11-2013 03:39 AM
Just saw you marked the other post as helpfull (and thanks for putting the post into the correct forum) - is there any other info that you need?
09-11-2013 09:00 PM
"switch(conf-if-te-1/0/2)# long-distance-isl 30000" is this command supported by VDX6720-24 switch?
what is the default ISL distance for this switch?
09-11-2013 09:35 PM
Yes the command is supported on the VDX6720-24. See next post (VDX 6720-60 and up only.
For normal ISL's, no commands is needed. Distance is based on the type of transciver you are using. So a 10g-SR is 300m
09-11-2013 09:42 PM
Hold on - just doubled checked the manual. It looks like the 6720-24 is NOT supported for distance ISL. Strange as 6720-24 and 6720-60 use the same chip (-60 just has more of them).
See the attached table.
09-12-2013 01:08 PM
Please see the Metro VCS section in the latest NOS 4.0.0 Admin guide . You will see the 6740 listed in there .
09-13-2013 03:15 AM
You would have known that 1000KM is more than the current max of 30KM.