Zyxel XGS3700-48 [5/9] Stacking link redundancy

ZyXEL Communication Crop, 4

2.2.2 Stacking Link Redundancy

Any one of the stacking link fails, the FTP throughput on Server will keep on 2Gbps.

There can be one ping lost during the stacking topology change caused by the

stacking link removed.

For video streaming, the stacking topology change needs more time to clear and

learn multicast table again. In this scenario, the video streaming will show up to 5

seconds of screen frozen when one of stacking link is down and recover.

2.2.3 Stacking Device Redundancy

If we turn off the Switch 1(Master switch) to simulate the case if somehow stacking

master is down.

The FTP throughput on Server will be down to 1Gbps. And it will show 3 to 5 ping lost

(around 10 seconds) while backup switch is taking over the operation.

If we turn the switch 1 back on again, Switch 1 will join the stacking group again.

Since Switch 1 with force master enable. It will take over the master role for stacking

group and will trigger re-initialization process, whole of stacking units will not

forwarding any date during this process. In this scenario, it will take around 30

seconds.

If we turn off the switch 2(Backup switch), there will be 2 to 3 ping lost due to the

LACP convergence. And video streaming will be frozen around 1 to 3 seconds.

Powered on switch2 again, it will show 1 to 2 ping lost for LACP convergence then the

FTP throughput back to 2 Gbps. And video streaming will be frozen around 1 to 3

seconds.

2.2.4 firmware Upgrade

There’re 2 ways to upgrade the firmware of a XGS3700 stack:

Web GUI

FTP

The following figure shows how to do the firmware upgrade through the web GUI.