Sometimes localhost, a software device, has a big MTU, like 8K, and it may apply for all local packets. Ethernet is 1500 total, and the payload is less IPV4 40 bytes plus 4 x any options. It seems like the app should be allowing frag if using non-tcp, and tcp is a stream, so the app has no business fussing with packet bits and lengths.
It may be PATH MTU testing, where the routing tables is extended with dynamic host route lines and the MTU of path to host. If ICMP says the packet does not fit, it will retry with a lower size, hence it does not want fragmentation, it wants PATH MTU information. Black holes are when firewalls block that ICMP informations, and the PATH MTU has to time out and assume it went into a black hole, and try a lower packet size to ensure a route exists.
Does anyone know how to or know of a web page where I can find how to change the MTU speed in Unix registry? Any info. would be greatly appreciated.
Thanks,
Techie (2 Replies)
I need to get all the rows in a file, for which length of field at column 6 is greater than 11.
I tried
awk '{ if ($#1 >11) print $1}' filename
But Iam getting some errors
I tried different combinations like
awk '{ if (${#$1} >11) print $1}' filename
awk '{ if (${#1} >11) print... (2 Replies)
Is there any importance of LS length in DB exchange packet of OSPF protocol as its should be always be 20 bytes. Is this length to be ignored (2 Replies)
Hi, Just want to ask on how to check and change the MTU size of the nodes from 1500 to 9000? I need to match the MTU size of some cluster nodes which has 1500 to the others with 9000 because they are inconsistent. Thanks (1 Reply)
HI All,
I have a file with contents like this:
apple
computer
terminal
applecomputernetworkrouterterminalrouter
network
router
applecomputernetworkrouterterminalrouter
I want to remove all lines with length greater than "18 alphabets". Hence, my output should be:
apple
computer... (1 Reply)
Couldn't find an IRIX forum, so I'm posting to this one...
Just had our SAs rebuild an IRIX machine and now I need to set the MTU to 1344 (vice 1500 default). I can set it manually using the ifconfig command, but it won't survive a reboot. I made an entry into the /etc/init.d/ifconfig-1.options... (0 Replies)
Hi,
I am trying to set mtu value for ipv6 interfaces. I know how to set it for ipv4 interfaces
ifconfig net1 mtu 1240
Do I need to add any iptype for the above command ?
Note:
OS:Solaris 10
TIA (3 Replies)