看来DMIT这次的网络问题，还要持续

DMIT 现已排查并隔离了该故障，仅 AS174 和 AS3257 单线接入（single-homed）的网络除外。

目前，Cogent 的洛杉矶城域网正遭遇严重中断，导致网络部分区域完全无法访问互联网。

截图展示了 DMIT 与 Cogent 互联接口的可达性及故障发生位置。

鉴于问题已得到隔离，流量已分流至 NTT、GSL、Arelion 和 GTT。DMIT 将不再更新关于 Cogent 的网络状态信息。

由于 Cogent 网络已无法使用，其入站和出站路由均已于 8 小时前移除。

原文：

DMIT has isolated the issue, except AS174 and AS3257 single home network.

Nevertheless, Cogent's Los Angeles metropolitan area network is experiencing a severe outage, with some parts of the network unable to access the Internet at all.

Screenshot shows the reachability of DMIT's Cogent interface and the location of failure.

Since this issue has been isolated, traffic was divert to NTT, GSL, Arelion and GTT. DMIT will stop update the network status of Cogent.

Both inbount and outbount routes from Cogent are removed 8hrs ago, since it's unusable.