From: MacDougall, Bruce (bmacdoug@xxxxxxx)
Date: Tue Feb 06 2001 - 15:17:57 GMT-3
I could be corrected, but I believe reassembly only occurs at the ultimate
destination, Host B in this case.
Comer, Volume 1, Third Edition, page 95.
Bruce
> -----Original Message-----
> From: Tariq Sharif [SMTP:tariq_sharif@btinternet.com]
> Sent: Tuesday, February 06, 2001 2:01 PM
> To: Ccielab@Groupstudy. Com
> Subject: Fragmentation Concepts
>
> Need some help on understanding IP fragmentation. In the setup below, are
> the steps below correct?
>
>
> LAN A |
> |
> Host A_| Serial line 1 Serial line 2
> | LAN B
> |______e0 R1 s0-------------------s0 R2
> s1---------------------------s0 R3 e0 -----------|
> |
> |
> |
> |-------Host B
>
> Host A sends 1500 bytes long packet to e0 of R1 (destined for Host B).
> R1 s0 has MTU set to 750 bytes. So R1 fragments packet into 2.
> R2 has MTU of 375 bytes on s1, R2 fragments packet into 2
> R3 has MTU of 1500 on Ethernet LAN B, so it reassembles the fragments into
> one 1500 byte long packet & hands it to Host B??
>
> Any references to sites/books will be greatly appreciated.
>
> Many thanks & regards.
>
> Tariq Sharif
>
>
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