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Router1's interface connecting to its own LAN is configured with the IP address 192.168.1.1.
The command "ip route 10.1.1.0 255.255.255.0 192.168.1.1 210
" is issued on router R1.
Later, Hosts on the local LAN reports that they are having connectivity issues to the remote network 10.1.1.0/24 on Router6. **Which of the following "ip route" parameters is causing the problem? **
10.1.1.0
210
192.168.1.1
255.255.255.0
EXPLANATION: the "210
" is an administrative distance, and it's extremely high, the highest regular value is 200 for Internal-BGP, and beyond 255 is considered unreachable. There may be other less favorable routes available than this one, but this is ignored because it is being used on an almost last chance basis due to the high admin-distance. + + + + This type of route is called a 'floating static route", and has a purposely high admin-distance so that it will become instantly available, ONLY IF, another more-preferred route fails, and as such, it doesn't appear in the route table unless you specifically ask for it like this: "show ip route 10.1.1.0
" // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -//
MODIFIED QUESTION 20151229, because it depended on entering an invalid command into the IOS --- it had the same "ip route command but with next-hop address of :"192.168.1.1
" -and- if you enter that into the router it says: "'%Invalid next hop address (it's this router)'" // = = = = = = = = = = = /
Since the IP address of 192.168.1.1 is the local router's LAN interface address, the command "ip route 10.1.1.0 255.255.255.0 192.168.1.1 210" will cause routing problems for packets destined to a remote network (10.1.1.0/24). Instead of using the local interface address of 192.168.1.1, use the next-hop router's interface address or the local router's (Router1) exit interface. The value 210 is the administrative distance manually defined and since the network has /24 prefix mask, 255.255.255.0 is correctly defined. (http://www.cisco.com/c/en/us/support/docs/ip/border-gateway-protocol-bgp/27082-ip-static-routes.html#reqs)
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