User’s Guide FUJITSU PSWITCH
December/2018 77
Port-channel can’t be modified and deleted if it exists in any link dependency
group
Normal port can’t be added to any port-channel if it exists in link dependency
group
3.1.2.10.1. FDB Update
When an upstream port is link down, entries learned by link down port in
Forwarding Database (FDB) will be copied and modified, and then assign to
downstream port. This action also applies to downstream port when upstream port
is link up. Furthermore, this feature also send some dummy Ethernet frames from
backup port to notify its network. The Ethernet frame only contains source MAC
address, which is a MAC address of a device learned from other interfaces except
interfaces that participated in the group, and destination MAC address with
broadcast address (FF:FF:FF:FF:FF:FF).
This feature has two limitations:
This feature only works with Backup Port group. Configuring this feature on Link
Down Relay group won’t take effect and considered as disabled.
This feature only supports one-to-one Backup Port group. Configuring this
feature on the group that has more than one port in upstream or more than one
port in downstream won’t take effect and considered as disabled.
3.1.2.10.2. Upstream threshold
If the link down ports of upstream reaches the threshold, i.e. link up upstream
ports are less than 11%, all upstream ports will be shut down. To restore the
upstream ports, users need to issue “no shutdown” to each upstream port in the
link dependency group. This feature has a limitation:
Upstream threshold only works with Backup Port group. Configuring this feature
on Link Down Relay group won’t take effect and considered as disabled.
3.1.2.11. Port Mirroring
Port mirroring monitors and mirrors network traffic by forwarding copies of
incoming and outgoing packets from up to four source ports to a monitoring port.
The switch supports up to four monitor sessions. Port mirroring, RSPAN, and VLAN
mirroring can be configured at the same time on the switch using different
sessions IDs and in any combinations. Any two sessions cannot be identical.
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