Information Technology Reference
In-Depth Information
Bridged Ethernet LLC/SNAP Encapsulation
Figure 5-29
LLC 0xAA-AA-03
OUI 0x00-80-C2
PID 0x00-01 or 0x00-07
PAD 0x00-00
MAC destination address
Remainder of MAC frame
LAN FCS (if PID is 0x00-01)
With bridged protocols, the OUI value in the SNAP header is the 802.1 organization code 0x00-
80-C2, and the actual type of the bridged media is specified by the two-octet PID.
ATM Interface Configuration
The following sections describe how to configure a router ATM interface for point-to-point and
point-to-multipoint connections.
To configure the ATM interface, log in to the router, enter the privileged EXEC mode, and enter
the commands in Example 5-14.
Example 5-14
Base ATM Interface Configuration
router# configure terminal
router(config)# interface atm
4
/0
router(config-if)# ip address 172.33.45.1 255.255.255.0
router(config-if)# no shutdown
router(config-if)# exit
router(config)# exit
router# copy running startup
In some cases, the router interface identifier is in the form
interface atm
slot
/
port-adapter
/0
or
interface atm
number
.
To configure a new ATM PVC, enter interface-ATM-VC configuration mode, and assign a VPI/
VCI for the PVC. Optionally, the PVC can be assigned a name. You can also configure ILMI,
QSAAL, or Switched Multimegabit Data Service (SMDS) encapsulation for the PVC if it is in
an SVC environment.
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