Create VLAN Window
This window appears when you click Create on the Configure VLAN
tab of the VLAN window. Use it to add a new VLAN.
Follow these steps:
- In the VLAN ID field, enter the ID of the
VLAN. Use an ID in the range 1 to 1001 or 1006 to 4094.
Notes:
- VLAN IDs 1002 to 1005 are reserved.
- VLAN IDs from 1006 to 4094 are available only on Catalyst 3550 switches
and on Catalyst 2950 switches running the enhanced
software image. The switch must be in VTP transparent mode.
- If the VLAN ID is from 1006 to 4094, the only parameter that you can configure
for the VLAN is the MTU size.
- In the VLAN Name field, enter a VLAN name
from 1 to 32 characters that is unique within the administrative domain.
The default name is VLANxxxx where xxxx represents four digits
(including leading zeros) equal to the VLAN ID number.
- From the VLAN Media Type list, select the
media type you want to configure.
- In the 802.10 SAID (security association
identifier) field, enter a number from 1 to 4294967294 that is unique within
the administrative domain.
The default is 100000 plus the VLAN ID.
- In the MTU Size field, enter a number from
1500 to 18190 for the maximum transmission unit (packet size in bytes) that
the VLAN can use.
The default is 1500.
- If you are translationally bridging from one VLAN
type to another (such as from Ethernet to FDDI), in the Translational Bridge
1 and Translational Bridge 2 fields, enter the VLAN IDs (from 1
to 1005) of the two VLANs to which this VLAN is translationally bridging.
By default, these fields are set to 0, which means translational bridging
is not in effect.
- From the VLAN Status list, select Active.
When the status is suspended, all traffic for that VLAN is blocked on all
switches in the management domain.
- If you are configuring a FDDI
or Token Ring VLAN, the Ring Number field
appears in the window. In it, enter a logical ring number from
1 to 4095.
The ring number is used for source routing. You must specify a ring number;
no default is defined.
- If you are configuring a FDDI
or Token Ring VLAN, the Parent VLAN field
appears in the window. In it, enter a parent VLAN ID number
from 0 to 1005.
Note: By default, this field is set to 0, which means no parent VLAN
is defined.
The parent VLAN of an FDDI VLAN must be an FDDI-NET VLAN, which represents
a set of ring segments connected by source-route bridges. The parent VLAN
is the VLAN ID to which the FDDI VLAN is attached for source routing functions.
- If you are configuring a FDDI-NET
or Token Ring-NET VLAN, the Bridge Number field
appears in the window. In it, enter a logical distributed source-route
bridge number (from 0 to 15) that interconnects all logical rings having the
same parent VLAN.
By default, this field is set to 0, which means that no source-routing bridge
is defined.
- If you are configuring a
FDDI-NET or Token Ring-NET VLAN, the STP Type list
appears in the window. From it, select IEEE, IBM,
or AUTO.
The default is IEEE for source-route transparent bridging.
Select IBM for source-route bridging.
Select AUTO for a combination of source-route bridging and
source-route transparent bridging. Use AUTO only if the VTP V2 mode
is enabled.
- If you are configuring a
Token Ring-NET VLAN, the Bridge Mode list
appears in the window. Select SRB (Source Route Bridging)
or SRT (Source-Route Transparent Bridging).
- If you are configuring a Token
Ring-NET VLAN, the ARE Max hops field
appears in the window. Enter the maximum number of hops for
All-Routes Explorer frames in the Token Ring Concentrator Relay Function (TRCRF).
- If you are configuring a Token
Ring-NET VLAN, the STE Max hops field
appears in the window. Enter the maximum number of hops for
Spanning-Tree Explorer frames in the TRCRF.
- If you are configuring a
Token Ring-NET VLAN, the Backup CRF list
appears in the window. Select On or Off to configure
a TRCRF VLAN as a backup TRCRF.
- Click OK.