migrating from 5220 to 3440 - 40 G interface question

[chinmayhg12]

Ports 21 and 22 on the 5520 device, which are 40G interfaces, are currently in use. We need to migrate this device to the 3440 model. However, on the 3440, I don't see a specific 40G interface listed. Instead, the documentation suggests using ports 35 and 36 for 40G connectivity, utilizing a breakout cable. This information is somewhat confusing as it also mentions that one port can be utilized as four 10G interfaces.

The documentation's ambiguity raises an important question: Is it possible to use ports 35 and 36 on the 3440 as a single 40G interface? This clarification is crucial for ensuring a smooth migration process and maintaining the required network capacity. Additionally, understanding the flexibility of these ports - whether they can function as a single 40G interface or be split into multiple 10G interfaces - will help in planning the optimal configuration for our network infrastructure.

[TomYoung]

Hi @chinmayhg12 ,

Yes, ports 35 and 36 are 40 Gbps ports without a breakout cable.

Two form-factor pluggable (QSFP+/QSFP28) 40Gbps/100Gbps Ethernet ports. These ports support RS-FEC.
Each interface supports breakout mode to create four 10Gbps or four 25Gbps ports each.

    Ports 27, 28, 29, and 30 break out from port 35
    Ports 31, 32, 33, and 34 break out from port 36

https://docs.paloaltonetworks.com/hardware/pa-3400-hardware-reference/pa-3400-series-overview/front-...

Thanks,

Tom