Difference between revisions of "MTU"
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eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 9001 | eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 9001 | ||
| − | * <code>ping -M do -s 9000 <some_ip_address></code> | + | * <code>[[ping -M]] do -s 9000 <some_ip_address></code> |
Select Path MTU Discovery strategy. hint may be either do (prohibit fragmentation, even local one), want (do PMTU discovery, fragment locally when packet size is large), or don't (do not set DF flag). | Select Path MTU Discovery strategy. hint may be either do (prohibit fragmentation, even local one), want (do PMTU discovery, fragment locally when packet size is large), or don't (do not set DF flag). | ||
Revision as of 08:19, 4 October 2021
wikipedia:Maximum transmission unit (MTU)
- Cisco IOS:
show system mtu
Change configuration on Linux:
ip link set dev eth0 mtu 9000(Jumbo frames)
ifconfig -a | grep mtu
ifconfig -a | grep mtu eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 9001
ping -M do -s 9000 <some_ip_address>
Select Path MTU Discovery strategy. hint may be either do (prohibit fragmentation, even local one), want (do PMTU discovery, fragment locally when packet size is large), or don't (do not set DF flag).
netsh interface ipv4 show interfaces
Related terms
- Jumbo frames
- debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
- Path MTU Discovery (PMTUD)
- sysctl:
net.ipv4.tcp_mtu_probing - WireGuard: https://wiki.archlinux.org/index.php/WireGuard#Low_MTU
iperf: -M, --mss
See also
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