cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
2996
Views
0
Helpful
0
Comments
TCC_2
Level 10
Level 10

Core issue

A Supervisor 720 (Sup720) running 12.2(17d)SXB1 that acts as a PE could display this error message, followed by a traceback:

%MSFC2-3-TOOBIG: Attempt to send giant packet on GigabitEthernet9/1 (1574 bytes from 83226C2, max allowed 1572)

This error message means that an attempt was made to send giant or oversized packet on [chars] ([dec] bytes from [hex], max allowed [dec]). This occurs when Multi Layer Switching (MLS) or Layer 3 switching does not fragment packets in the event of messages larger than 1580 bytes.

This problem is identified in Cisco bug ID CSCee95708.

Resolution

The workaround for this issue is to increase the MTU size on the affected interface. In order to adjust the maximum packet size or MTU size, issue the mtu command. After the MTU size is configured larger than 1580 bytes, this error message can be avoided.

Alternatively, in order to resolve this problem, upgrade the Cisco IOS  Software on the switch to the 12.2(18)SXD and later releases, available for download from the IOS Upgrade Planner.

Getting Started

Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: