Avaya BayRS Version 15.5.0.0 Uživatelský manuál stáhnout pdf (Strana 52)

BayRS Version 15.5.0.0 Document Change Notice

6-2 314470-15.5 Rev 00

For example, to change the line speed to 10Mbps:

ethernet/2/1# dsqms-line-speed 10000000

ethernet/2/1#

Router Processing of Tagged Frames

802.1Q tagging is supported on 10BASE-T and 100BASE-T interfaces that

connect the Nortel Networks router to an 802.1Q-compliant switch or routing

switch. With 802.1Q tagging enabled, the physical connection between the router

and the adjacent device supports multiple virtual connections.

The number of connections is equal to the number of virtual connections plus a

default physical connection that provides transit services for other non-VLAN

traffic that may be received from or forwarded to the adjacent device.

Upon receipt of a frame across a virtual connection, a circuit manager strips the

four bytes of 802.1Q header information and directs a now standard Ethernet

frame to a connection-specific routing process. The routing process consults its

forwarding table and, in turn, directs the frame to a circuit manager handling the

next-hop connection. If that connection is a non-tagged, non-virtual connection,

processing is completed as for any other standard Ethernet frame.

However, if the next-hop connection is a tagged, virtual connection, the circuit

manager inserts the four bytes of 802.1Q header information that identify that

VLAN into the standard Ethernet header. After performing the 802.1Q

encapsulation, the circuit manager forwards the frame across the virtual

connection toward the destination VLAN.

Implementation Considerations

Before you configure 802.1Q tagging on a router, note the following

considerations:

• 802.1Q tagging is supported on 10BASE-T and 100BASE-T interfaces; it is

not supported on other LAN interfaces.

• 802.1Q tagging cannot be used to extend a VLAN across multiple devices.

• The VLAN type (port-based, protocol-based, address-based, and so on) is

ignored by the router.

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Avaya BayRS Version 15.5.0.0 Uživatelský manuál Strana 52