encapsulation tr-isl
Use the encapsulation tr-isl subinterface configuration command to enable TRISL, a Cisco proprietary protocol for interconnecting multiple routers and switches and maintaining VLAN information as traffic goes between switches.
encapsulation tr-isl trbrf-vlan vlan-id bridge-num bridge-number
| Syntax | Description |
|---|---|
| vlan-id | Number identifying the VLAN. |
| bridge-number | Keyword that specifies the identification number of the bridge number on the ISL trunk. Possible values are 01 to 4095. |
Command Mode
Subinterface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.3(4)T.
Examples
In the following example, TRISL is enabled on a Fast Ethernet interface:
interface FastEthernet4/0.2 encapsulation tr-isl trbrf-vlan 999 bridge-num 14 ...
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