校园网 dns ip 劫持？

校园网支持 v6，于是想找个同时支持 v4 和 v6 的 dns 在手机上用，就试了下科大的 dns。但是 ping 发现响应来自一个内网 ip。。。
[shproc] Process[pid=8042, hasExited=false]
PING 202.38.64.1 (202.38.64.1) 56(84) bytes of data.
From 10.191.1.6: icmp_seq=1 Redirect Host(New nexthop: 10.191.1.1)
From 10.191.1.6: icmp_seq=2 Redirect Host(New nexthop: 10.191.1.1)
From 10.191.1.6: icmp_seq=3 Redirect Host(New nexthop: 10.191.1.1)
From 10.191.1.6: icmp_seq=4 Redirect Host(New nexthop: 10.191.1.1)
From 10.191.1.6: icmp_seq=5 Redirect Host(New nexthop: 10.191.1.1)
From 10.191.1.6: icmp_seq=6 Redirect Host(New nexthop: 10.191.1.1)
From 10.191.1.6: icmp_seq=7 Redirect Host(New nexthop: 10.191.1.1)
From 10.191.1.6: icmp_seq=8 Redirect Host(New nexthop: 10.191.1.1)
From 10.191.1.6: icmp_seq=9 Redirect Host(New nexthop: 10.191.1.1)
From 10.191.1.6: icmp_seq=10 Redirect Host(New nexthop: 10.191.1.1)
From 10.191.1.6: icmp_seq=11 Redirect Host(New nexthop: 10.191.1.1)
From 10.191.1.6: icmp_seq=12 Redirect Host(New nexthop: 10.191.1.1)
From 10.191.1.6: icmp_seq=13 Redirect Host(New nexthop: 10.191.1.1)
From 10.191.1.6: icmp_seq=14 Redirect Host(New nexthop: 10.191.1.1)
From 10.191.1.6: icmp_seq=15 Redirect Host(New nexthop: 10.191.1.1)
From 10.191.1.6: icmp_seq=16 Redirect Host(New nexthop: 10.191.1.1)
From 10.191.1.6: icmp_seq=17 Redirect Host(New nexthop: 10.191.1.1)
From 10.191.1.6: icmp_seq=18 Redirect Host(New nexthop: 10.191.1.1)
From 10.191.1.6: icmp_seq=19 Redirect Host(New nexthop: 10.191.1.1)
From 10.191.1.6: icmp_seq=20 Redirect Host(New nexthop: 10.191.1.1)
From 10.191.1.6: icmp_seq=21 Redirect Host(New nexthop: 10.191.1.1)
From 10.191.1.6: icmp_seq=22 Redirect Host(New nexthop: 10.191.1.1)
From 10.191.1.6: icmp_seq=23 Redirect Host(New nexthop: 10.191.1.1)
From 10.191.1.6: icmp_seq=24 Redirect Host(New nexthop: 10.191.1.1)

问一下有啥方法能在安卓手机上优先访问 v6