Questions tagged [mtu]
For questions about or in relation to the maximum transmission unit (MTU).
132 questions
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What bottleneck/factor decides the MTU for a network?
I don't mean calculating minimum MTU along a path.
I mean, what factors determine how large an MTU can be at all? Is there a physical bottleneck of some sort? For example MTU for the Internet is 1500 ...
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MTU size on physical and logical port in OSPF
A single physical interface has multiple sub-interfaces (VLAN interfaces). These sub-interfaces are configured with IP addresses and OSPF. The MTU of the physical interface has been increased, but the ...
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How to determine the real MTU and MSS size of my WAN connection (cable modem) [duplicate]
during the setup of wireguard tunnels on my pfSense, I stumbled over the topic of MSS and how to set it correctly. There are many values and recommendations, but as far as I understand the real ...
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What is the MTU size of an application traversing a WAN link?
I have a WAN link with jumbo frame support set to 9216
This WAN link terminates on a Juniper MX480 and there is also a sub-tending EX4300 switch
I want to replace that WAN link with lower costs ...
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Packet Drop. MTU Mismatch in the given network [closed]
Following is the Structure of Network along with MTUs on the interface (on which connection is made)
We can assume that connection is bidirectional.
Now, we are getting RX packet drop on Server C.
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MTU - proactively setting to lower than 1500 on endpoints to prevent tunnel issues
With machines being deployed to various locations where internet is controlled by others, sometimes there can be one or two tunnels which necessitates using lower MTU to avoid communication issues, ...
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Why is MSS important? Why can't we just rely on the MTU?
Note: I understand both what MTU and MSS do so I am not asking about their function here. I understand that when a TCP connection is being established, the MSS is exchanged and it dictates the maximum ...
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Pinging packets greater than 1500 between two proper configured machines on proper configured networks, always possible?
Given the following 3 subnet topology, I will give names to them to simplify it, I am using planets, I see it as a perfect geographic enumeration.
Sites
Office on Earth 172.1.x FiOS, default MTU
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Is it safe to enable jumbo frames on switches in general
Can any harm occur by simply enabling jumbo frames on your switch infrastructure?
I understand that in a given flow from one machine to another all participants need to support jumbo frames to arrive ...
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IP fragmentation and PMTUD
I have 2 questions.
1) According to a lot of sources, when IP packets gets fragmented, in this case, lets take icmp, the icmp header is present only in the first packet.
But I have observed on some ...
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Why MTU setting change not showing any meaning change in file transfer via tcp?
I performed a test in which I transferred a file of 1GB by opening a tcp port on destination server with MTU 1000.
then I tried to change the MTU from 1000 to 9000 and the total time duration of 1GB ...
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How can a router know the MTU of the next router?
https://www.cloudflare.com/learning/network-layer/what-is-mtu/
Suppose Server A and Computer A are connected, but the data packets
they send to each other have to pass through Router B and Router C
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Brocade 7450 - set MTU to 9000
I have brocade icx 7450.
I already enabled jumbo frames to increase MTU packets on switch.
But unfortunately I am not able to change MTU size of port which I want. When typing after choosing interface ...
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Sanity Check: Changing MTU on Wifi Endpoints (computers) should be a LAST resort, right?
A client of mine has an organizational network that is comprised of a lot of Ubiquity gear, primarily switches and wireless routers to power their network, with a Sophos XG firewall at the border.
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GRE tunnel bridging and MTU mismatch
Background
My workplace has 2 office areas which is only 200 meters away from each other. They have their own local networks, their own Internet connections, with routers configured to fallback to the ...
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