设备型号：S10506X, Release 7585
问题描述：现场反馈ip route-static vpn-instance WW 0.0.0.0 0 172.19.254.9这条路由之前没人上过设备区下发这条，导致有业务走这条不通，删除后正常。
问题排查：
如下配置导致的，掩码下的是0，会配置为全0的默认路由
Line 17686: %Sep 27 11:12:40:787 2024 xxx.xxx.xxx SHELL/6/SHELL_CMD: -Line=vty0-IPAddr=172.20.196.7-User=4Auser; Command is ip route-static vpn-instance XX xx.xx.xx.xx 0 x.x.x.x
[DR2N]ip route-static vpn-instance XX xx.xx.xx.xx 0 x.x.x.x
[DR2N]dis cu
[DR2N]dis current-configuration | in 0.0.0.0
ip route-static vpn-instance XX 0.0.0.0 0 x.x.x.x
现场版本较老，建议升级到R7639P03H04版本。
升级后对于该种配置，会打印提示信息，并无法下发。
[135_S10510_70.1]ip route-static vpn-instance WW 1.1.1.1 0 2.2.2.2
Mismatched destination address and mask were configured. Failed to generate static route 0.0.0.0/0.
[135_S10510_70.1]