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Enabling ILMI for Cell Relay

The JUNOS software supports standard AAL5 and three Layer 2 circuit transport modes: Layer 2 circuit AAL5, Layer 2 circuit cell-relay, and Layer 2 circuit trunk transport mode.

Integrated local management interface (ILMI) is supported on standard AAL5 interfaces, regardless of encapsulation. To enable ILMI on interfaces with cell-relay encapsulation, you must configure an ATM2 IQ PIC to use Layer 2 circuit trunk transport mode. ILMI is not supported with cell-relay encapsulation when the ATM2 IQ PIC is configured with Layer 2 AAL5 or Layer 2 circuit cell-relay transport mode, as shown in as shown in Table 28.

Layer 2 circuit cell-relay trunk mode is not supported on ATM OC48 PICs.

Table 28: ILMI Support by Encapsulation Type

Encapsulation Type	ILMI Support
Standard AAL5, with any encapsulation type	Yes
Layer 2 circuit AAL5 mode	No
Layer 2 circuit cell-relay mode	No
Layer 2 circuit trunk mode	Yes

For more information about Layer 2 circuit transport modes, see Configuring Layer 2 Circuit Transport Mode.

To configure ILMI on an interface with cell-relay encapsulation, include the following statements:



[edit chassis fpc slot-number pic pic-number]
atm-l2circuit-mode trunk trunk;
[edit interfaces at-fpc/pic/port]

encapsulation atm-ccc-cell-relay;
atm-options {
ilmi;
pic-type atm2;
}
unit logical-unit-number {

trunk-id number;
}

For more information about ILMI, see Configuring Communication with Directly Attached ATM Switches and Routers.

Example: Enabling ILMI for Cell Relay

On an ATM2 IQ PIC with Layer 2 circuit trunk transport mode, enable ILMI on an interface with cell-relay encapsulation:



[edit chassis]
fpc 0 {


pic 1 {
atm-l2circuit-mode trunk uni;
}


}
[edit interfaces]
at-0/0/0 {
encapsulation atm-ccc-cell-relay;


atm-options {
pic-type atm2;
ilmi;
}


}

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