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Configuring ATM and MPLS Services
1-22
117374-C Rev 00
SVC Access Methods
SVCs use signaling messages to dynamically establish, maintain, and clear a
switched virtual connection at the UNI. These messages (as defined by the Q.2931
standard for signaling protocols) allow the router to assess the availability of an
ATM end point (device), establish a connection with that device, maintain that
connection for the duration of data transfer, and then clear the connection when
the transfer is complete.
Assigning ATM Addresses
An ATM address is composed of a network prefix and a user part. Bay Networks
routers use the autogeneration feature to create the user part of the ATM address
by combining the MAC address of the ATM interface with a unique selector byte
to create unique addresses (Figure 1-10
). You can also enter ATM addresses
manually.
Figure 1-10. ATM Address Components
39000000000000000000000000
0000A20CA98F 00
390000000000000000000000000000A20CA98F00
0000A20CA98F00
ATM address
Network prefix
User part
MAC address
Selector
byte
ATM0037A
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