Icmp Support; Ipv6 Tunnel Routing Table; Indirect Next Hop Support; Figure 14: Direct Next Hops - Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - IP-IPV6-IGP CONFIGURATION GUIDE 2010-10-31 Configuration Manual

IPv6 Tunnel Routing Table

Indirect Next Hop Support

Copyright © 2010, Juniper Networks, Inc.

ICMP Support

Internet Control Message Protocol (ICMP) provides a mechanism that enables a router
or destination host to report an error in data traffic processing to the original source of
the packet. For this release, the E Series router supports ICMP for use in the IPv6 ping
and traceroute commands.
The ping and traceroute commands help you determine destination reachability within
a network.
Use the ping ipv6 command to send an ICMP echo request packet. In the following
example, the request packet is sent to address 1::1 with a data size of 200 and a timeout
value of 10 seconds:
host1#ping ipv6 1::1 data-size 200 timeout 10
Use the traceroute ipv6 command to discover routes that router packets follow when
traveling to their destination. In the following example, the trace destination address
is 1::1, the maximum number of hops of the trace is 20, and the timeout value is 10
seconds:
host1#traceroute ipv6 1::1 hop-limit 20 timeout 10
The IPv6 tunnel routing tables include IPv6 routes that point only to tunnels, such as
MPLS tunnels. The tunnel routing table is not used for forwarding. Instead, protocols
resolve next hops by looking up the routes that point to tunnels. The routes in the tunnel
routing table cannot be redistributed. See JunosE BGP and MPLS Configuration Guide for
more information.
The router uses indirect next hops to promote faster network convergence (for example,
in BGP networks) by decreasing the number of routing table changes required when a
change in the network topology occurs.
Direct next-hops point routes in the routing table toward individual, direct next-hop
connections. (See Figure 14 on page 127.)

Figure 14: Direct Next Hops

Chapter 2: Configuring IPv6
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