Network OS Administration Guide

Supporting Network OS 6.0.1a

Part Number: 53-1003768-04

Metro VCS using long-distance ISLs

Extending Ethernet Fabrics over distance is accomplished by using long-distance ISLs. The buffer allocation within a single port group is optimized, which extends the supported ISL distance.

Metro VCS supports long-distance ISL ports up to 30 km on the Brocade VDX platforms listed in the following table. Links up to 10 km are lossless.

Table 19 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 6740

yes

yes

yes

yes

Brocade VDX 6940-144S - 10GbE interface

yes

yes

yes

yes

Brocade VDX 8770 - LC48x10G linecard

yes

yes

yes

yes

Brocade VDX 6940-144S - 10GbE interface

yes

yes

yes

yes

The following table lists the conditions on extended ISLs for Network OS hardware.

Table 20 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

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

Node redundancy check

yes

yes

yes

yes

vMotion

yes

yes

yes

yes

Maximum PFCs supported

3 (2 on the Brocade VDX 6740)

3(2 on the Brocade VDX 6740)

3 (2 on the Brocade VDX 6740)

3 (2 on the Brocade VDX 6740)

Long-distance ISL on 40G to 4x10G breakout interfaces

no

no

no

no

Long-distance ISL on 1G and 10G copper interfaces

no

no

no

no

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

Table 21 Long-distance Metro VCS port-group schema

Platform

Port groups

Number of port groups on platform

Brocade VDX 6740

1-32, 33-48 (49-52 are 40G ports and do not support long distance)

2 *

Brocade VDX 6940-144S - 10GbE interface

1-24+61-72, 25-48+73-84, 49-60, 85-96

4

Brocade VDX 8770 (LC48x10G linecard)

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

6 per 10GbE blade

Brocade VDX 6940-144S - 10GbE interface

1-24+61-72, 25-48+73-84, 49-60, 85-96

4

* 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.