Siemens S223 - Manual (Page 183)

User Manual UMN:CLI
SURPASS hiD 6615 S223/S323 R1.5
A50010-Y3-C150-2-7619 183
Advantages Disadvantages
VLAN association rules only need to be applied
once.
Tags can only be interpreted by VLAN aware devices.
Only edge switches need to know the VLAN as-
sociation rules. Edge switches must strip tags before forwarding
frames to legacy devices or VLAN-unaware domains.
Core switches can get higher performance by
operating on an explicit VLAN identifier. Insertion or removal of a tag requires recalculation of
the FCS, possibly compromising frame integrity.
VLAN-aware end stations can further reduce the
performance load of edge switches. Tag insertion may increase the length of a frame be-
yond the maximum allowed by legacy equipment.
Tab. 8.1 Advantages and Disadvantages of Tagged VLAN
Mapping Frames to VLAN
From the perspective the VLAN-aware devices, the distinguishing characteristic of a
VLAN is the means used to map a given frame to that VLAN. In the case of tagged frame,
the mapping is simple – the tag contains the VLAN identifier for the frame, and the frame
is assumed to belong to the indicated VLAN. That’s all there is to it.
To configure the tagged VLAN, use the following command.
Command Mode Description
vlan add VLANS PORTS tagged Bridge
Configures tagged VLAN on a port:
VLANS: enter the VLAN ID.
PORTS: enter the port number
8.1.6 VLAN Description
You can describe each VLAN with the following command
Command Mode Description
vlan description VLANS DESC
Describes VLAN characteristic:
VLANS: enter the VLAN ID.
DESC: enter the detail description
no vlan description VLANS
Bridge
Deletes the description about specified VLAN ID.
8.1.7 Displaying VLAN Information
User can display the VLAN information about Port based VLAN, Protocol based VLAN
and QinQ.
Command Mode Description
show vlan Shows all VLAN configurations.
show vlan VLANS Shows a configuration for specific VLAN.
show vlan description Shows a description for specific VLAN.
show vlan dot1q-tunnel Shows QinQ configuration.
show vlan protocol
Enable
Global
Bridge
Shows VLAN based on protocol.