Routing Commands
190
ProSAFE M7100 Managed Switches
The columns for the routing table display the following information:
To administratively control the traffic destined to a particular network and prevent it from being
for
warded through the router, you can configure a static reject route on the router. Such traffic
would be discarded and the ICMP destination unreachable message is sent back to the source.
This is typically used for preventing routing loops. The reject route added in the RTO is of the type
OSPF Inter-Area. Reject routes (routes of REJECT type installed by any protocol) are not
redistributed by OSPF/RIP. Reject routes are supported in both OSPFv2 and OSPFv3.
The following shows example CLI display output for the command.
(Switch) #show ip route
Route Codes: R - RIP Derived, O - OSPF Derived, C - Connected, S - Static
B - BGP Derived, IA - OSPF Inter Area
E1 - OSPF External Type 1, E2 - OSPF External Type 2
N1 - OSPF NSSA External Type 1, N2 - OSPF NSSA External Type 2
C 1.1.1.0/24 [0/1] directly connected, 0/11
C 2.2.2.0/24 [0/1] directly connected, 0/1
C 5.5.5.0/24 [0/1] directly connected, 0/5
S 7.0.0.0/8 [1/0] directly connected, Null0
OIA 10.10.10.0/24 [110/6] via 5.5.5.2, 00h:00m:01s, 0/5
C 11.11.11.0/24 [0/1] directly connected, 0/11
S 12.0.0.0/8 [5/0] directly connected, Null0
S 23.0.0.0/8 [3/0] directly connected, Null0
Term Definition
Code The codes for the routing protocols that created the routes.
IP-Address/Mask The IP-Address and mask of the destination network corresponding to this route.
Preference The administrative distance associated with this route. Routes with low values are
pr
ef
erred over routes with higher values.
Metric The cost associated with this route.
via Next-Hop The outgoing router IP address to use when forwarding traffic to the next router (if any)
in the path t
ow
ard the destination.
Route-Timestamp The last updated time for dynamic routes. The format of Route-Timestamp will be
• Day
s:Hours:Minutes if days > = 1
• Hours:Minutes:Seconds if days < 1
Int
erface The outgoing router interface to use when forwarding traffic to the next destination. For
rejec
t routes, the next hop interface would be Null0 interface.
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