Baby Giant Frames
Baby giants are frames that are only slightly larger than allowed by the IEEE Ethernet standards. Baby jumbo frames are for example required to enable IP/MPLS over Ethernet to deliver Ethernet services. Most implementations will require non-jumbo user frames to be encapsulated into MPLS frame format which in turn may be encapsulated into a proper Ethernet frame format with EtherType values of 0x8847 and 0x8848. The increased overhead of extra MPLS and Ethernet headers means that the support of 1600 byte frames is a mandatory requirement in Carrier Ethernet Networks.
Read more about this topic: Jumbo Frame
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