Questions tagged [pmtud]

For questions on Path MTU discovery.

Filter by
Sorted by
Tagged with
4 votes
2 answers

TCP MSS - Dynamic Adjustment

I've seen most of TCP flows having DF bit set. So any additional overheads like VXLAN can cause can cause TCP packet to be dropped(since df bit set) ? How the TCP MSS will be adjusted dynamically (in ...
Alan's user avatar
  • 41
2 votes
2 answers

How exactly does Path-MTU Blackhole Detection work?

I'm currently trying to understand how the Path-MTU Blackhole Detection really works. From what I understand: You send rather big packets, starting at like 1460 Bytes (TCP example) and wait for ...
Gereon99's user avatar
  • 123
0 votes
1 answer

OSI model transition between layers (data chunking across layers)

There is something I don't understand regarding the OSI model. From what I learned, sometimes information will need to broken down into smaller pieces of information. My question is - let's say that ...
RandomAsker889's user avatar
2 votes
2 answers

MTU the most Confusing Networking term. Lot of questions

I have ton of questions and i feel this is most confusing term for me. The more i read the confusion deepens. I am not able to connect dots. please help. Do we need MTU adjustment with EoMPLS/dot1q ...
Terminator's user avatar
4 votes
1 answer

Can the MTU size change on a local network if non of my software attempt to do that?

From the ip manual page (man 7 ip), we read that the MTU may change over time. When PMTU discovery is enabled, the kernel automatically keeps track of the path MTU per destination host. When it is ...
Alexis Wilke's user avatar