User Manual

NETGEAR M4500 Series Switches CLI Command Reference Manual 903
Display Message
The show ipv6 route command displays the routing tables in the following format:
Codes: C - connected, S – static, 6To4 – 6to4 Route , B - BGP Derived, D - Database Route
O - OSPF Intra, OI - OSPF Inter, OE1 - OSPF Ext 1, OE2 - OSPF Ext 2
ON1 - OSPF NSSA Ext Type 1, ON2 - OSPF NSSA Ext Type 2, K - Kernel
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 forwarded
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. Reject routes are supported in both OSPFv2 and
OSPFv3.
Fields
Definition
Code
The code for the routing protocol that created this routing entry.
IPv6-Prefix/IPv6-Prefix-
Length
The IPv6-Prefix and prefix-length of the destination IPv6 network corresponding
to this route.
Preference/Metric
The administrative distance (preference) and cost (metric) associated with this
route. An example of this output is [1/0], where 1 is the preference and 0 is the
metric.
Tag
Displays the decimal value of the tag associated with a redistributed route, if it
is not 0.
Next-Hop
The outgoing router IPv6 address to use when forwarding traffic to the next
router (if any) in the path toward the destination
Route-Timestamp
The last updated time for dynamic routes. The format of Route-Timestamp will
be
• Days:Hours:Minutes if days > = 1
• Hours:Minutes:Seconds if days < 1
Interface
The outgoing router interface to use when forwarding traffic to the next
destnation. For reject routes, the next hop interface would be Null0 interface.
T
A flag appended to an IPv6 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 beacause 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.