Networking :: Packet Needs To Be Fragmented By DF With 1511
May 31, 2011
I have a synology 1511+ nas. My network transfer speeds are very slow, < 1meg a sec in some cases. It's next to unbearable.Anyway was reading about this thing that said to ping it using the -f settings and here's the result.
C:UsersJason Fonseca>ping -f -l 2000 192.168.1.139
Pinging 192.168.1.139 with 2000 bytes of data:
Packet needs to be fragmented but DF set.
Packet needs to be fragmented but DF set.
Packet needs to be fragmented but DF set.
[Code]...
The website said to adjust the MTU settings in order to get rid of this message but I don't know what to change.
What needs to be done here?
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Jan 1, 2013
i got trouble for this ipv4 & ipv6 fragment trafic prob/attack.how do i prevent it from comming in to my network? is it way to prevent it in cisco router part?
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Jun 5, 2011
An IP packet of size 1500 bytes passes through two network segments before it reaches its destination. The header size of this packet is 20 bytes. The maximum size of an IP packet in the first intermediate network (its MTU) is 1024 bytes, and that in the second network is 576 bytes.Explain how the IP packet described above would be fragmented into smaller parts in a router, paying particular attention to the flag bits and to the fragment offset field in the header.
- Fragmentation and reassembly needs to break a data-gram into an almost random number of pieces that later can reassembled.
- It uses the identification field to ensure that fragments of different datagrams are not mixed.
- IP packet of 1500 bytes comprises 1480 bytes of data and a 20-byte header.
- In the first intermediate network, the packet size of 1024 bytes allows for 1000 bytes of data plus a 20-byte IP
header.[code]
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when performing packet capture in a FWSM
[code]...
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IXIA----DUT-----IXIA
| | |
|_______ |________|
DUT has redudant connections to IXIA. Im pumping traffic from IXIA and traffic takes PATH A .. When I shut PATH A, i expect traffic to shift to PATH B within 100ms (example). How do I test this ?
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