3550 MTU Question

From: Dennis J. Hartmann (dennisjhartmann@hotmail.com)
Date: Wed Apr 06 2005 - 23:20:02 GMT-3

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Anyone know the difference between the following two commands. I always
thought that the 3550 limited Ethernet frames to 1546 bytes and did not
allow for Ethernet jumbo frames, but in VLAN configuration I can configure
MTU frame sizes up to 18,190 bytes? Anyone have an explanation on this one?

S5(config)#system mtu 1546 ?
<cr>

S5(config)#vlan 300
S5(config-vlan)#mtu ?
<576-18190> Value of VLAN Maximum Tranmission Unit

Sincerely,

Dennis J. Hartmann

White Pine Communications

dh8@pobox.com

CCSI#23402/CCIP/CCNP/CCDP/CCNA/CCDA

Cisco IP Voice Support & Design Specialist

Cisco Optical, VPN & IDS Specialist

MCSE

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