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For Multlink interface ,MTU size is set to 1500,but able to ping upto 9000.How???

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Sep 9th, 2014
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For Multlink interface ,MTU size is set to 1500,but able to ping upto 9000.How???

Multilink is bundle of 2 E1 in chanellized STM-1

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pranaweshk Tue, 09/09/2014 - 05:17
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Thanks Jon

On Multilink , fragment is disable....

Is this is the reason ???/

 

Jonathan Robb Tue, 09/09/2014 - 05:43
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Ah not sure - just to verify, are you setting the DF bit on your ping and testing that way?

-Jonathan

Joseph W. Doherty Tue, 09/09/2014 - 08:29
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Posting

No, that's a PPP option.

As Jonathan has asked, are you setting DF in your ping?  If not, ping will allow larger than MTU, it will just fragment the IP packet.

pranaweshk Wed, 09/10/2014 - 03:49
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Hi Josheph , How PPP is support for Jumbo ping....?

Joseph W. Doherty Wed, 09/10/2014 - 04:13
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The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.

Liability Disclaimer

In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.

Posting

It's not PPP, it's IP that does.

Again, try setting DF and see if it works.

However, if you're just ping across the PPP link, often serial media used with PPP supports MTUs larger than Ethernet.

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