Westermo RedFox Series - Manual (Page 272)

Westermo OS Management Guide
Version 4.17.0-0
possible to route IP traffic between network interfaces. For more information on
network interfaces and routing, see
chapter 19 .
Internally, a WeOS switch can have one or more channels to the CPU, where each
channel has a capacity of 100 Mbit/s or 1000 Mbit/s.
Section 13.1.6 describes how
VLANs can be mapped to different CPU channels to achieve increased routing
performance.
Layer-2 priority was described in a previous chapter, see section 8.1.4 . In addi-
tion to different per port priority settings, it is possible to assign specific layer-2
priority per VLAN, see
section 13.1.4 .
The switch supports efficient distribution of IP multicast packets by use of IGMP
snooping. See
section 13.1.5 for more information on per VLAN IGMP snooping
features.
The switch provides support for dynamic VLANs by WeOS Adaptive VLAN Trunk-
ing (AVT). AVT can be used to simplify VLAN configuration in larger WeOS LAN
infrastructures. AVT is described further in
section 13.1.7 .
13.1.2 Supported number of VLANs and VLAN integrity
Every VLAN needs to be associated with a unique VLAN ID (VID).
❼ Switches support configuration of up to 64 simultaneous VLANs 2 .
❼ Valid VIDs for configuration are in range 1-4094.
❼ Some VLAN IDs are reserved for specific use - currently this concerns a set
of VIDs in use by the FRNT protocol, see section 14.1.3 .
Switches only accept packets for VLANs to which the inbound port is associated.
Additional rules for accepting a packet is described below:
❼ When an untagged packet is received on a port, that packet will be mapped
to the port’s default VID. If the port is associated with that VLAN (tagged or
untagged), the packet will be accepted, otherwise dropped.
❼ The port’s default VID will be the VID of the VLAN to which the port is as-
sociated untagged. If the port is not associated untagged to any VLAN, the
default VID is set to the fall-back default-VID (see also
section 8.1.10 ) if con-
figured, otherwise to VID 1.
2 Special restriction on DDW-142/DDW-142-485: On these products the limit is 60 VLANs when
FRNT is configured on the unit, and 64 VLANs when FRNT is not configured.
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