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pppoe上网。

ppp0 Link encap:Point-to-Point Protocol
inet addr:183.254.138.15 P-t-P:183.254.128.1 Mask:255.255.255.255
UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1492 Metric:1
RX packets:175498 errors:0 dropped:0 overruns:0 frame:0
TX packets:179098 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:3
RX bytes:155152446 (147.9 MiB) TX bytes:20095491 (19.1 MiB)


请问，这个 P-t-P:183.254.128.1 是什么？:183.254.138.15是外网的ip.

参考 http://superuser.com/questions/466521/w ... onnections

进一步参考
http://baike.baidu.com/view/3246.htm
https://en.wikipedia.org/wiki/Point-to- ... r_Ethernet