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499
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10
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mtu size

CSCO10320953
Level 1
Level 1

You have a MTU of 512 bytes on serial link. Packet comes with 1024 bytes. What is true?

Router discards packet

Router fragments, if DF bit is not set

Router fragments and Router on other end of the link will reassemble

Destination on other end will reassemble

9 Replies 9

sourabhagarwal
Level 4
Level 4

Router discards packet should be the right one.

bvsnarayana03
Level 5
Level 5

Router fragemnts the pkt.

would u explain it sir

Hi, by default router fragment but there is an special bit at the frame that if is set it (DF=1, don't fragment) then the router discards the frame.

Regards

I agree with ISABEL,

The router will fragment the packet and will discard only if the Dont Fragment is set

Narayan

Hi,

What is the difference of MTU listed under

"sh int fa0/0" and "sh ip int fa0/0"

Tx.

Jay

The "sh int fa 0/0" will show the interface information no matter it is configured w/ ip or not.

http://www.cisco.com/en/US/products/sw/iosswrel/ps5207/products_command_reference_chapter09186a00801a7edb.html#wp1217547

The "sh IP int fa 0/0" will only show the interface info. if it is configured with IP.

http://www.cisco.com/en/US/products/sw/iosswrel/ps1828/products_command_reference_chapter09186a008008802e.html#wp1028374

Hope this helps.

Jack - thanks.

You're welcome. :)

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