Lucent Technologies 9077 16S - Manual (Page 83)

Monitoring and Management Tools
SP Switch Router UNIX tools
SP Switch Router Adapter Guide - 1.4 Update 2 October 22, 1999 3-7
The UNIX route command can be used to manually add or delete routes. When route is used,
no media card or system reset is needed to install the new routes, the new routes are updated in
the kernel and downloaded into each media card automatically.
The SP Switch Router grrt command can also be used to examine the routing table on a
specific media card but it is not recommended for routing table configuration because it does
not ensure that routing tables are synchronized among the various media cards.
Static routes can also be set by editing the /etc/grroute.conf configuration file. Changes
made via this configuration file do not take effect until the affected media card is reset or the
SP Switch Router system is reset.
IP dynamic routing can be configured by editing the /etc/gated.conf configuration file and
running the gated daemon in the SP Switch Router. GateD implements complex routing
protocols. Please refer to the GRF Reference Guide and the GRF Configuration Guide for
information about using GateD on the SP Switch Router.
Note: If you plan to run GateD, set up your static routes in /etc/gated.conf by using the
Static statement. If you add routes using the route command when GateD is active, those
routes are not maintained and are removed by GateD.
grroute.conf file
Route tables can also be set by editing the /etc/grroute.conf configuration file. Changes
made via this configuration file do not take effect until the affected media card is reset.
Information in
grroute.conf is eventually turned into route commands.
tcpdump
This standard UNIX media examination tool is modified for use with media card protocols.
tcpdump prints out all packet headers or a specified type of header transmitting on the target
network. Note that tcpdump can interfere with network operations and performance.
tcpdump works on the router’s Ethernet LAN interface located on the SP Switch Router
control board (
de0 ), and the router’s communications bus ( rmb0 ). The TCP Dump utility also
functions on the SP Switch Router Adapter card.
To collect packet headers from an SP Switch Router Adapter card in slot 6, enter:
# tcpdump -i gt060
traceroute
This standard UNIX command prints the route that packets likely take to a destination network
host. traceroute uses the ICMP/IP parameters time-to-live and time-exceeded to trace a route
between two IP entities.
You can use the traceroute command to determine if packets from an SP node are actually
being routed through the SP Switch Router to get to the target destination address.