Lenovo Flex System Fabric CN4093, Инструкция по применению

Страница: 242 / 634

242
CN4093 Application Guide for N/OS 8.4
If using the 2 x 40Gb ports as stacking links, first convert the 40Gb ports from their
default 4x10Gb mode of operation to 40Gb mode. See: “Configuring QSFP+ Ports”
on page 160 .
Use the following command to specify the links to be used in the stacking LAG:
Note:
Ports configured as Server ports for use with VMready cannot be designated
as stacking links.
5.
On each switch, perform a reboot:
6.
Physically connect the stack LAGs.
To create the recommended topology, attach the two designated stacking links in a
bidirectional ring. As shown in Figure 25 , connect each switch in turn to the next,
starting with the Master switch. To complete the ring, connect the last Member
switch back to the Master.
Figure 25.
Example of Stacking Connections
Note:
The stacking feature is designed such that the stacking links in a ring
topology do not result in broadcast loops. The stacking ring is thus valid (no
stacking links are blocked), even when Spanning Tree protocol is enabled.
Once the stack LAGs are connected, the switches will perform low ‐ level stacking
configuration.
Note:
Although stack link failover/failback is accomplished on a sub ‐ second basis,
to maintain the best stacking operation and avoid traffic disruption, it is
recommended not to disrupt stack links after the stack is formed.
CN 4093(config)# boot stack higig-trunk
<list of port names or aliases>
CN 4093(config)# reload
Switches
connected in
bidirectional
ring topology
Member
Switch
Member
Switch
Member
Switch
Master
Switch