关于VRP3.3-0008版本使用X25线路无法ping通大包的问题

问题描述：

R系列路由器VRP3.3-0008版本使用X25线路，出现端口的物理状态和链路协议都是UP状态。但是可能会出现无法ping通超过98Byte的报文，现象如下：

<Router>ping xxx.xxx.xxx.1

  PING xxx.xxx.xxx.1: 56  data bytes, press CTRL_C to break

    Reply from xxx.xxx.xxx.1: bytes=56 Sequence=1 ttl=59 time=177 ms

    Reply from xxx.xxx.xxx.1: bytes=56 Sequence=2 ttl=59 time=178 ms

    Reply from xxx.xxx.xxx.1: bytes=56 Sequence=3 ttl=59 time=176 ms

    Reply from xxx.xxx.xxx.1: bytes=56 Sequence=4 ttl=59 time=176 ms

    Reply from xxx.xxx.xxx.1: bytes=56 Sequence=5 ttl=59 time=182 ms

  --- xxx.xxx.xxx.1 ping statistics ---

    5 packet(s) transmitted

    5 packet(s) received

    0.00% packet loss

    round-trip min/avg/max = 176/177/182 ms

 

<Router>ping ip -s 98 xxx.xxx.xxx.1

  PING xxx.xxx.xxx.1: 98  data bytes, press CTRL_C to break

    Request time out

    Request time out

    Request time out

  --- xxx.xxx.xxx.1 ping statistics ---

    4 packet(s) transmitted

    0 packet(s) received

    100.00% packet loss

<Router>ping ip -s 97 xxx.xxx.xxx.1

  PING xxx.xxx.xxx.1: 97  data bytes, press CTRL_C to break

    Reply from xxx.xxx.xxx.1: bytes=97 Sequence=1 ttl=59 time=230 ms

    Reply from xxx.xxx.xxx.1: bytes=97 Sequence=2 ttl=59 time=229 ms

    Reply from xxx.xxx.xxx.1: bytes=97 Sequence=3 ttl=59 time=231 ms

    Reply from xxx.xxx.xxx.1: bytes=97 Sequence=4 ttl=59 time=229 ms

    Reply from xxx.xxx.xxx.1: bytes=97 Sequence=5 ttl=59 time=284 ms

  --- xxx.xxx.xxx.1 ping statistics ---

    5 packet(s) transmitted

    5 packet(s) received

    0.00% packet loss

round-trip min/avg/max = 229/240/284 ms

从而导致业务无法使用。

 

解决方案：

可以在两边设备的接口上配置MTU 128命令来规避。

对于无法配置该命令的情况可以通过升级临时解决问题版本来解决问题。