5000 Series Layer 2/3 Managed Data Center Switch CLI Reference Guide
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Code
Codes for the routing protocols that created the routes.
Default Gateway
IP address of the default gateway. When the system does not have a
more specific route to a packet’s destination, it sends the packet to the
default gateway.
IP-Address/Mask
IP-Address and mask of the destination network corresponding to this
route.
Preference
Administrative distance associated with this route. Routes with low
values are preferred over routes with higher values.
Metric
Cost associated with this route.
via Next-Hop
Outgoing router IP address to use when forwarding traffic to the next
router (if any) in the path toward the destination.
Route-Timestamp
Last updated time for dynamic routes. The format of Route-Timestamp
is:
•
Days:Hours:Minutes if days > = 1
•
Hours:Minutes:Seconds if days < 1
Interface
O
utgoing router interface to use when forwarding traffic to the next
destination. For reject routes, the next hop interface would be Null0
interface.
Truncated
A flag appended to a route to indicate that it is an ECMP route, but only
one of its next hops has been installed in the forwarding table. The
forwarding table may limit the number of ECMP routes or the number of
ECMP groups. When an ECMP route cannot be installed because such
a limit is reached, the route is installed with a single next hop. Such
truncated routes are identified by a
T
after the interface name.
To administratively control the traffic destined to a particular network and prevent it from being forwarded
through the router, you can configure a static reject route on the router. Such tr
affic 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. Reject routes are
supported in OSPFv2.
7-39
show ip route ecmp-groups
Report all current ECMP groups in the IPv4 routing table. An ECMP group is a set of two or more next
hops used in one or more routes. The groups are numbered arbitrarily from 1 to n. The output indicates
the number of next hops in the group and the number of routes that use the set of next hops. The output
lists the IPv4 address and outgoing interface of the next hop in each group.
show ip route ecmp-groups
Parameters
None
