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maximum MTU on ISRs

What is the maximum MTU for following interafces on Cisco ISR Routers?

Ethernet

Gigabit Ethernet

Serial Interface

DS3 interface(NM-1T3/E3)

E1(VWIC2-xMFT-T1/E1

1 REPLY
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Re: maximum MTU on ISRs

Hello Sumesh,

DS3 should be 4470 bytes

all the other interfaces should default to 1500 bytes of IP L3 MTU

Hope to help

Giuseppe

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