路由表中的dead pervasive是什么意思？

lyking

我在路由表中添加了三个缺省的路由，添加完后看路由表时发现，第三条多了个dead pervasive，是怎么回事？

1. [root@linuxrouter root]# ip route show table test
   
2. 220.163.36.1 dev ppp0  proto kernel  scope link  src 220.163.36.35
   
3. 61.159.253.1 dev ppp1  proto kernel  scope link  src 61.159.253.81
   
4. 192.168.253.0/24 dev eth2  scope link
   
5. 192.168.254.0/24 dev eth1  scope link
   
6. 10.0.0.0/23 dev eth0  scope link
   
7. 169.254.0.0/16 dev eth2  scope link
   
8. 127.0.0.0/8 dev lo  scope link
   
9. default
   
10.         nexthop via 10.0.0.14  dev eth0 weight 1
    
11.         nexthop via 192.168.254.254  dev eth1 weight 1
    
12.         nexthop via 192.168.253.254  dev eth2 weight 1 [b]dead pervasive[/b]
    
13. [root@linuxrouter root]# cat /tmp/route/route_ppp1

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