Brocade Network OS Administrator’s Guide v4.1.1 User Manual

Page 160

Conditions for long-distance Metro VCS (Continued)

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

Node redundancy check

yes

vMotion

yes

Maximum PFCs supported 3 (2 on the Brocade

VDX 6740, 6740T,
6740T-1G)

3(2 on the Brocade
VDX 6740, 6740T,
6740T-1G)

3 (2 on the Brocade
VDX 6740, 6740T,
6740T-1G)

The following lists the port groups and number of port groups available on each platform for long-
distance Metro VCS.

Long-distance Metro VCS port-group schema

TABLE 29

Platform

Port groups

Number of port groups on
platform

Brocade VDX 6720-60 (10 GbE)

1-10, 11-20, 21-30, 31-40, 41-50, 51-60 6

Brocade VDX 6730-76 (10 GbE)

1-10, 11-20, 21-30, 31-40, 41-50, 51-60 6

Brocade VDX 6740, 6740T, 6740T-1G

1-32, 33-48

2 *

Brocade VDX 8770 (VDX LC48x10G
linecard)

1-8, 9-16, 17-24, 25-32, 33-40, 41-48

6 per 10GbE blade

* Not a valid deployment scenario at distances longer than 5 km, as no normal ISLs are allowed if both
port groups are configured with long-distance ISLs for 10 km and 30 km.

Guidelines and restrictions for long-distance Metro VCS

Consider the following when configuring long-distance Metro VCS:

• For fabrics with more than two nodes, the VCS license must be installed on all switches in the fabric

clusters.

• The Metro VCS fabric is only supported on 10-G interface links.
• Brocade trunking is not supported with long-distance ISLs, but up to eight 8-link ECMP trunks can

be used.

• Edge ports cannot be configured with DCB maps.
• Edge ports and port groups with long-distance links cannot be configured by means of the fcoeport

default command.

• A maximum of three PFCs can be supported on a Metro VCS configured platform. By default, PFC

is enabled by class 3 and 7.

• The Brocade VDX 6740, 6740T, and 6740T-1G switches support only two PFCs.
• All the ports in the port group are rebooted when a port is configured for long distance.
• For 2-, 5-, 10-km long distance, use Brocade-supported long-range (LR) optics for direct

connectivity.

• For 30-km long distance, use Brocade-supported extended-range (ER) optics for direct connectivity.
• A port group containing a long-distance port cannot have a CEE map configuration on any edge

port.

Guidelines and restrictions for long-distance Metro VCS

160

Network OS Administrator’s Guide

53-1003225-04