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Option: Selecting an MTU for a Layer 2 Circuit


To configure the MTU for each individual Layer 2 circuit, include the mtu statement at the [edit protocols l2circuit neighbor ip-address interface interface-name] hierarchy level. If the MTU setting between Layer 2 circuit neighbors does not match, the Layer 2 circuit is torn down.


If you configure an MTU value for an ATM cell relay interface on an ATM2 PIC and simultaneously configure an MTU value for a Layer 2 circuit that uses the same ATM2 PIC, the MTU value for the Layer 2 circuit takes precedence when calculating the cell bundle size and is advertised to Layer 2 circuit neighbors.