Brocade Network OS Administrator’s Guide v4.1.1 - Manual (Page 159)

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.
Limitations for long-distance Metro VCS TABLE 27
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
Brocade 6740T
Brocade 6740T-1G
yes yes yes yes
Brocade VDX 8770 - VDX
LC48x10G linecard yes yes yes yes
The following lists the conditions on extended ISLs for Network OS hardware.
Conditions for long-distance Metro VCS TABLE 28
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 1 1 1 1
Number of regular ISLs
supported on a port group
configured for long
distance 1 1 0 0
Trunking support between
multiple long-distance ISLs no no no no
CEE map or FCoE port
allowed in same port group no no no no
eNS Sync (MAC address
table sync) yes yes yes yes
Zoning yes yes yes yes
HA failover yes yes yes yes
Configuring Metro VCS
Network OS Administrator’s Guide 159
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