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Networking is working fine on my gentoo machine. One connection is made, everything works fine with normal speed. But it is slow to wake-up : starting up connection is taking time. Even pinging local-host takes ages (approx 5 seconds).

Any ideas how to make this fast.

UPDATE : Output of some commands. 

ifconfig 
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
    inet 10.107.105.13  netmask 255.255.240.0  broadcast 10.107.111.255
    inet6 fe80::e269:95ff:fe24:8d3a  prefixlen 64  scopeid 0x20<link>
    ether e0:69:95:24:8d:3a  txqueuelen 1000  (Ethernet)
    RX packets 1071380  bytes 978317595 (932.9 MiB)
    RX errors 0  dropped 1979  overruns 0  frame 0
    TX packets 310432  bytes 30846997 (29.4 MiB)
    TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
    device interrupt 20  memory 0xfe400000-fe420000  

ping -c 5 localhost
PING localhost (127.0.0.1) 56(84) bytes of data.
64 bytes from Calvin (127.0.0.1): icmp_seq=1 ttl=64 time=0.017 ms
64 bytes from Calvin (127.0.0.1): icmp_seq=2 ttl=64 time=0.029 ms
64 bytes from Calvin (127.0.0.1): icmp_seq=3 ttl=64 time=0.031 ms
64 bytes from Calvin (127.0.0.1): icmp_seq=4 ttl=64 time=0.030 ms
64 bytes from Calvin (127.0.0.1): icmp_seq=5 ttl=64 time=0.033 ms

--- localhost ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 3999ms
rtt min/avg/max/mdev = 0.017/0.028/0.033/0.005 ms

ping -c 5 127.0.0.1
PING 127.0.0.1 (127.0.0.1) 56(84) bytes of data.
64 bytes from 127.0.0.1: icmp_seq=1 ttl=64 time=0.018 ms
64 bytes from 127.0.0.1: icmp_seq=2 ttl=64 time=0.021 ms
64 bytes from 127.0.0.1: icmp_seq=3 ttl=64 time=0.034 ms
64 bytes from 127.0.0.1: icmp_seq=4 ttl=64 time=0.031 ms
64 bytes from 127.0.0.1: icmp_seq=5 ttl=64 time=0.033 ms

--- 127.0.0.1 ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 3998ms
rtt min/avg/max/mdev = 0.018/0.027/0.034/0.008 ms
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Could you post the output of ping -c 5 localhost? Do you still get a delay when you do ping 127.0.0.1? – Flup Mar 18 at 8:59
@Dilawar Please add ifconfig output in your question – Rahul Patil Mar 18 at 8:59
@Flup Add the output. You suspicion was right. Localhost and 127.0.0.1 are giving different response time. – Dilawar Mar 18 at 9:20
@RahulPatil Added ifconfig output. – Dilawar Mar 18 at 9:20
You are pinging it 5 times. One ping = one second. Five pings = five seconds. Please clarify what you mean by "wake-up" and "starting connection". What is taking time? Once which connection has been made? In all my exp. ifconfig eth0 10.3.0.6 up or DHCP is instantaneous. Doing pppoe takes some seconds, though... Your responses are < 100 ms! What do you mean very slow ?! – Ярослав Рахматуллин Mar 18 at 9:28
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1 Answer

up vote 3 down vote

As localhost and 127.0.0.1 are giving different response times, this is a name resolution problem. Check /etc/resolv.conf to make sure that it contains the correct addresses for your nameservers. If you're not sure of the right addresses, you could try

nameserver 8.8.8.8
nameserver 8.8.4.4

It's slightly odd that localhost doesn't resolve from an entry in /etc/hosts, so you may want to check that it contains a line that looks something like

127.0.0.1   localhost
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Added line in /etc/hosts and it is fine now. Thanks. – Dilawar Mar 18 at 11:27

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