Avaya MTU size when connecting a Nortel router to a Cisco router
Configuring the MTU size of a Nortel Networks router's serial interface to the default value may result in packet drop at the Cisco router.
The cause of the packet drop is strictly because of the MTU size (1600 bytes) configured at Nortel Networks. This size is big enough for the Nortel Networks router to transmit this packet without any fragmentation.
Testing shows that for Nortel Networks to fragment frames that Cisco will accept, the interface MTU at Nortel Networks needs to be reduced. The range that works is from 1506 to 1587.
Avaya MTU size when connecting a Nortel router to a Cisco router
Configuring the MTU size of a Nortel Networks router's serial interface to the default value may result in packet drop at the Cisco router.
The cause of the packet drop is strictly because of the MTU size (1600 bytes) configured at Nortel Networks. This size is big enough for the Nortel Networks router to transmit this packet without any fragmentation.
Testing shows that for Nortel Networks to fragment frames that Cisco will accept, the interface MTU at Nortel Networks needs to be reduced. The range that works is from 1506 to 1587.
Avaya MTU size when connecting a Nortel router to a Cisco router
Configuring the MTU size of a Nortel Networks router's serial interface to the default value may result in packet drop at the Cisco router.
The cause of the packet drop is strictly because of the MTU size (1600 bytes) configured at Nortel Networks. This size is big enough for the Nortel Networks router to transmit this packet without any fragmentation.
Testing shows that for Nortel Networks to fragment frames that Cisco will accept, the interface MTU at Nortel Networks needs to be reduced. The range that works is from 1506 to 1587.
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