ROS IPIP本地虚接口实接口配置好后不通

ROS IPIP本地虚接口实接口配置好后不通

1,先排除两边防火墙规则是否有放行。
2,如果防火墙无问题，检查mss值有无做重分片规则。
3,以下是我网做的一个ipip tunnel，并能ping通的规则，(路由a外网ip xxx.xxx.xxx.xxx ,ipiptunnel地址10.6.60.2;;;; 路由b外网ip yyy.yyy.yyy.yyy,ipiptunnel地址10.6.60.1)
路由a:
[admin@8] /ip address> /in ip ex

/interface ipip
add comment="" disabled=no local-address=xxx.xxx.xxx.xxx mtu=1480 name=ipip1 \
remote-address=yyy.yyy.yyy.yyy
[admin@8] /ip address> print where interface=ipip1
Flags: X - disabled, I - invalid, D - dynamic
# ADDRESS NETWORK BROADCAST INTERFACE
60 10.6.60.2/30 10.6.60.0 10.6.60.3 ipip1
[admin@8] /ip address> /ping 10.6.60.1
10.6.60.1 64 byte ping: ttl=64 time=28 ms
10.6.60.1 64 byte ping: ttl=64 time=48 ms
2 packets transmitted, 2 packets received, 0% packet loss
round-trip min/avg/max = 28/38.0/48 ms

路由b
[administrators@MikroTik] > in ip ex

/interface ipip
add comment="" disabled=no local-address=yyy.yyy.yyy.yyy mtu=1480 name=ipip1 \
remote-address=xxx.xxx.xxx.xxx
[administrators@MikroTik] > /ip ad print where interfa=ipip1
Flags: X - disabled, I - invalid, D - dynamic
# ADDRESS NETWORK BROADCAST INTERFACE
[administrators@MikroTik] > /ip ad print where interface=ipip1
Flags: X - disabled, I - invalid, D - dynamic
# ADDRESS NETWORK BROADCAST INTERFACE
0 10.6.60.1/30 10.6.60.0 10.6.60.3 ipip1
[administrators@MikroTik] > ping 10.6.60.2
10.6.60.2 64 byte ping: ttl=64 time=69 ms
10.6.60.2 64 byte ping: ttl=64 time=87 ms
10.6.60.2 64 byte ping: ttl=64 time=58 ms
3 packets transmitted, 3 packets received, 0% packet loss
round-trip min/avg/max = 58/71.3/87 ms追问回来逛一圈，关于MMS分片那个具体体现故障是怎么样的啊，咋那个地方？貌似我没动过