Reference v4.1.0 Instruction Manual

Network OS Command Reference 437
53-1003115-01
long-distance-isl
2
long-distance-isl
Extends an ISL link up to 30 km.
Synopsis long-distance-isl {2000 | 5000 | 10000 | 30000}
no long-distance-isl
Operands 2000 Specifies a 2 km distant link.
5000 Specifies a 5 km distant link.
10000 Specifies a 10 km distant link.
30000 Specifies a 30 km distant link. DCB/FCoE capabilities are not supported
with this setting.
Defaults The default is 2 km.
Command Modes Interface subtype configuration mode
Description Use this command to extend an ISL link up to 30 km. An ISL port with PFC supports up to 10 km
distance on Brocade VDX 6710, 6720, and 6730 series platforms. Up to 10 km links are lossless.
You can have eight 1 km links forming a brocade trunk. You can also have mixed length cables
forming the ISL. For ECMP purposes, you can have eight 8-link ECMP trunks.
Usage Guidelines Metro VCS supports long-distance ISL ports up to 30 km on the Brocade VDX platforms listed
below. Links up to 10 km are lossless. You can have eight 1-km links forming a Brocade trunk. You
can also have mixed length cables forming the ISL. For ECMP purposes, you can have eight 8-link
ECMP trunks.
The following displays the limitations on extended ISL for Network OS hardware.
Limitations for long-distance Metro VCS
Supported hardware Extended ISL
up to 2 km
Extended ISL
up to 5 km
Extended ISL
up to 10 km
Extended ISL
up to 30 km
Brocade VDX 6720-60 yes yes yes yes
Brocade VDX 6730-76 yes yes yes yes
Brocade VDX 6740 yes yes yes yes
Brocade VDX 8770 - VDX LC48x10G line card yes yes yes yes
Conditions for long distance Metro VCS
Condition Extended ISL
up to 2 km
Extended ISL
up to 5 km
Extended ISL
up to 10 km
Extended ISL
up to 30 km
Support for lossless FCoE/iSCSI
traffic on the Metro VCS port-group
yes yes yes no
Layer 2/IP Lossy Traffic support yes yes yes yes
Number of Metro VCS long distance
ports supported per port group
1111