Link sit0?

Hi_This_is_Dev · 09-23-2009, 06:28 AM

Hi,

Consider this output:

Code:

[root@localhost ~]# ip addr show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000
    link/ether 00:1d:60:7d:39:ad brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.13/24 brd 192.168.1.255 scope global eth1
    inet 192.168.1.20/24 brd 192.168.1.255 scope global secondary eth1
    inet6 fe80::21d:60ff:fe7d:39ad/64 scope link 
       valid_lft forever preferred_lft forever
3: eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast qlen 1000
    link/ether 00:22:b0:53:25:41 brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.20/24 brd 192.168.1.255 scope global eth0
4: sit0: <NOARP> mtu 1480 qdisc noop 
    link/sit 0.0.0.0 brd 0.0.0.0
[root@localhost ~]#

[1] What is sit0?

[2] Does "/8" in "inet 127.0.0.1/8" mean that the self-loop back ip range is from 1 to 8?

Thanks!

Wim Sturkenboom · 09-23-2009, 06:35 AM

google sit0 does not help you?

Hi_This_is_Dev · 09-23-2009, 07:06 AM

What are experts, then, for?

Quote:

Originally Posted by Wim Sturkenboom

google sit0 does not help you?

yangm97 · 11-09-2021, 06:43 PM

Quote:

Originally Posted by Wim Sturkenboom

google sit0 does not help you?

Google brought me right here, smart pants. And now look what you made me do, create a forum account just to funnel my frustration with idiots like you through thread necromancy.

Anyway for anyone as unfortunate as me to land here who may also be tired of doing the keyword-change dance and/or skimming through spam/unhelpful links/useless videos/ads/whatever Google felt like throwing at you, lo and behold an answer:

sit is a kernel module which provides the so called 6to4 tunnel capability for linux, which is used to ease the IPv4 to IPv6 transition by allowing IPv4 traffic to travel inside IPv6 links. This module, when loaded, creates the sit0 interface.

Now why this sit0 interface has appeared on your system for seemingly no reason we may never know. What I do know however is that you can remove it: https://askubuntu.com/questions/2360...work-interface

jefro · 11-11-2021, 03:34 PM

8 is a short form of the subnet mask. Typically one might find a class based subnet in the range that the IP resides.

TB0ne · 11-11-2021, 04:42 PM

Quote:

Originally Posted by yangm97

Google brought me right here, smart pants. And now look what you made me do, create a forum account just to funnel my frustration with idiots like you through thread necromancy.

Anyway for anyone as unfortunate as me to land here who may also be tired of doing the keyword-change dance and/or skimming through spam/unhelpful links/useless videos/ads/whatever Google felt like throwing at you, lo and behold an answer:

sit is a kernel module which provides the so called 6to4 tunnel capability for linux, which is used to ease the IPv4 to IPv6 transition by allowing IPv4 traffic to travel inside IPv6 links. This module, when loaded, creates the sit0 interface. Now why this sit0 interface has appeared on your system for seemingly no reason we may never know. What I do know however is that you can remove it: https://askubuntu.com/questions/2360...work-interface

No idea what you looked at, because putting "sit0 linux" into Google pulls up a LOT of information saying exactly what it's for, without any 'videos/ads/spam/unhelpful links/etc' that you're talking about. First hit is an exact explanation..second is a hit from this very site (from two years after this thread was opened), saying the same thing. Along with developer white-papers from Red Hat explaining it in GREAT detail.

Yet you came here after 12 years just to complain and call someone else names?? Answers were easily found then (and now)...hard to believe you couldn't find them.