台灣大寬頻2M/128固4 IP ADSL ping值頗高

在台南的家裡申請的adsl是早期TTN台灣電訊的入門固4 IP，主要是回台南有網路可用，平時有些資料會丟在家裡的linux再連回去抓

92年左右申請時是512/64，幾年前電路升到1M/64，後來TTN被台灣大寬頻併掉後，固定IP繼續保留使用
在去年底電路又升到2M/128，連到ATU-R去看，局端所設定的值還設到2400k/160k(如下)

Adsl Line Status OPERATIONAL
Adsl Mode G.DMT
Up Stream 160 kb (Interleave)
Down Stream 2400 kb (Interleave)
Attenuation Near End: 19.5
Far End: 24.5
SNR Margin Near End: 28
Far End: 18
HEC Count 0
Firmware 0x41e2be1f
15 min ES Counter 0
CRC Errors 0
1 day ES Counter 0


問題是連線的品質一直不理想，看了ping值，都要5x ms起跳
做了一些測試，問題應是出在家裡到gateway這段的ping太高...
從台北去ping台南機房裡的gateway，還比台南家裡的機器ping台南的gateway還快...

請問我該如何解決會比較好吧？


以下是ping測試，家裡的固定IP是在210.192.63.0/24這網域，default gateway是210.192.63.254


1.家裡linux ping gateway
[sssun][/home/sssun] ping 210.192.63.254
PING 210.192.63.254 (210.192.63.254) 56(84) bytes of data.
64 bytes from 210.192.63.254: icmp_seq=1 ttl=127 time=77.0 ms
64 bytes from 210.192.63.254: icmp_seq=2 ttl=127 time=54.4 ms
64 bytes from 210.192.63.254: icmp_seq=3 ttl=127 time=57.5 ms
64 bytes from 210.192.63.254: icmp_seq=4 ttl=127 time=139 ms

64 bytes from 210.192.63.254: icmp_seq=5 ttl=127 time=55.6 ms

--- 210.192.63.254 ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 3999ms
rtt min/avg/max/mdev = 54.433/76.861/139.580/32.433 ms



2.家裡linux ping 台灣大寬頻的dns，很明顯的問題是出在家裡到gateway這條
[sssun][/home/sssun] ping 211.78.215.137
PING 211.78.215.137 (211.78.215.137) 56(84) bytes of data.
64 bytes from 211.78.215.137: icmp_seq=1 ttl=58 time=65.5 ms
64 bytes from 211.78.215.137: icmp_seq=2 ttl=58 time=56.5 ms
64 bytes from 211.78.215.137: icmp_seq=3 ttl=58 time=223 ms
64 bytes from 211.78.215.137: icmp_seq=4 ttl=58 time=58.0 ms
64 bytes from 211.78.215.137: icmp_seq=5 ttl=58 time=57.0 ms
64 bytes from 211.78.215.137: icmp_seq=6 ttl=58 time=59.3 ms

--- 211.78.215.137 ping statistics ---
6 packets transmitted, 6 received, 0% packet loss, time 5012ms
rtt min/avg/max/mdev = 56.523/86.747/223.984/61.447 ms



3.學網ping 家裡機器的default gateway，這裡的反應還滿快的啊
從台北去ping台南機房裡的gateway，還比台南家裡的機器ping台南的gateway還快
[ns2][/home/sssun] ping 210.192.63.254
PING 210.192.63.254 (210.192.63.254) 56(84) bytes of data.
64 bytes from 210.192.63.254: icmp_seq=1 ttl=118 time=7.43 ms
64 bytes from 210.192.63.254: icmp_seq=2 ttl=118 time=15.0 ms
64 bytes from 210.192.63.254: icmp_seq=3 ttl=118 time=9.11 ms
64 bytes from 210.192.63.254: icmp_seq=4 ttl=118 time=7.69 ms
64 bytes from 210.192.63.254: icmp_seq=5 ttl=118 time=7.94 ms

--- 210.192.63.254 ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 4000ms
rtt min/avg/max/mdev = 7.439/9.446/15.046/2.860 ms