mtu Questions

7

I'm hitting my curl on ubuntu terminal and getting this response curl: (35) OpenSSL SSL_connect: SSL_ERROR_SYSCALL in connection to domain.com:443 . I really can't understand why it happens. I trie...
Appurtenance asked 25/7, 2017 at 10:40

2

Solved

I need to permanently change MTU to 1500. By permanently I mean if I reboot the system or if I do service network restart it should always be 1500. I followed this article http://www.cyberciti.biz/...
Alasteir asked 3/10, 2014 at 13:17

1

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I have production docker swarm with 9 stacks, most of them have volumes. Currently docker is running with single node. I have to add second node and it is the place where problems started. Especial...
Cape asked 24/7, 2022 at 20:21

2

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I use BluetoothGatt.requestMtu(512) in my android application. First time it works well But Right after Mtu is changed automatically to 23 (default) I dont know what is the problem... this a log `D...
Habsburg asked 25/1, 2021 at 10:39

2

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is there any way to change the MTU value on iOS from the default to an arbitrary value? Much like in Android it's possible to do requestMTU(512). Thanks
Melly asked 14/7, 2021 at 9:26

4

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I have to write a code where I need to send data using udp protocol in python. I need to set the packet size to the MTU value of the network. Is there any way that I can decide the MTU value of the...
Latrishalatry asked 23/12, 2012 at 11:35

3

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I am working on an application where I need to send large data in multiple UDP packets to a client, how can I determine programmatically the MTU for my UDP socket? I need to be able to do this on ...
Nether asked 25/10, 2012 at 17:14

0

I am implementing DPLPMTUD and I want to suppress the Linux kernel from returning -1 with errno = EMSGSIZE when I send UDP packet longer than the local interface's MTU. I want to avoid the pain of ...
Gunman asked 10/7, 2020 at 21:28

1

After researching a lot with no positive result on Google, it made me post a question here. I would like to know if there is a way to negotiate the MTU size with a BLE peripheral. I am using Plug...
Minutes asked 23/10, 2019 at 15:2

7

Any command to know the MTU size of Android?
Eighteenmo asked 6/7, 2012 at 14:28

6

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I need to know what the largest UDP packet I can send to another computer is without fragmentation. This size is commonly known as the MTU (Maximum Transmission Unit). Supposedly, between 2 comput...
Supraorbital asked 23/5, 2009 at 2:16

3

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I'm currently developing a BLE App for iOS. In my application I need to implement a segmentation protocol to send large quantities of data using BLE. My application need to have the Central role. M...
Chronicles asked 1/2, 2017 at 10:46

4

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A client requested that the MTU limit should be 1492. Is there a way to do it in the source code (program in C)? Is there any other way to do it in general? (ifconfig?) Why does somebody needs ...
Gyratory asked 5/5, 2011 at 20:42

2

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Can UDP packet be fragmented to several smaller ones if it exceeds MTU? It seems that MTU fragmentation is about IP layer so I think it can. If so, what is the recommended max. packet size t...
Rajewski asked 2/8, 2016 at 14:33

5

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ifconfig 1.2.3.4 mtu 1492 This will set MTU to 1492 for incoming, outgoing packets or both? I think it is only for incoming
Casavant asked 15/6, 2011 at 16:18

2

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I'm doing some experiments with path MTU discovery in Linux. As far as I understood from RFC 1191, if a router receives a packet with non-zero DF bit and the packet can't be sent to the next host w...
Debauched asked 22/7, 2011 at 11:28

2

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I have couple of VMs running on Openstack. I have one data network gateway assigned into the switch with MTU=1500, where VMs has to running. Also in Openstack, I have set the default MTU=15...
Kirkwall asked 21/6, 2016 at 8:4

1

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What would happen if my udp package is larger than mtu? Say my package is 512 bytes, after encapsulated, the package is 572 bytes. In transporting, some intermediate node fix it mtu size to 512 byt...
Fusibility asked 17/7, 2017 at 12:33

2

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How can I implement a manual MTU discovery with Python? From: https://networkengineering.stackexchange.com/a/28988/23983 Send a ping to a target, in my example, I'll use Google's DNS server (8....
Stichter asked 4/4, 2016 at 11:56

4

I need to send some data over the subnet with fixed non-standard MTU (for example, 1560) using TCP. All the Ethernet frames transfered through this subnet should be manually padded with 0's, if the...
Copter asked 31/5, 2011 at 14:29

2

When acting on a UDP socket, what can cause sendto() to send fewer bytes than requested? The motivation for asking this is to figure out the precautions I need to take to ensure I always get a comp...
Gelt asked 4/6, 2014 at 18:56

2

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Or: What is the maximum payload size for a TCP/IPv4 packet. Much appreciated! Cheers.
Runnerup asked 5/2, 2012 at 17:38

1

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When using pcap_open_live to sniff from an interface, I have seen a lot of examples using various numbers as SNAPLEN value, ranging from BUFSIZ (<stdio.h>) to "magic numbers". Wouldn't it ma...
Laroy asked 19/2, 2012 at 17:58

3

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I am developing an application in C#, using the server-client model, where the server sends a byte array with a bitmap to the client, the client loads it into the screen, sends an "OK" to the serve...
Compurgation asked 20/4, 2009 at 16:30
1

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