Dell 720N Laptop User Manual


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4-12 Dell PowerVault 720N, 740N, and 760N System Administrator and Command Reference Guide
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For routing its own packets, the filer relies on the default route and explicit routes.
Typically, the filer learns explicit routes through
icmp
redirect messages received
from the default router; you do not need to enter explicit routes in the filers routing
table. To display the filers current routing table, use the
netstat -r
command. For
example:
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If you must enter explicit information into the filers routing table, use the
route
com-
mand. See the
route
(1) man page about how to add or modify information in the
routing table.
If the filer cannot find an explicit route in the routing table for a particular destination,
it uses the default route. This means that the filer sends the traffic to the default
router, which is specified in the
/etc/dgateways
file in the root volume.
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One default router is specified during
setup
. You can, however, add potential default
routers at any time to the
/etc/dgateways
file in the root volume. For each added
router, you should also specify the metric, which is a number indicating the route pref-
erence for the router. The highest preference is 1, which is also the default preference
for the router specified during
setup
. The lowest preference is 15. For information
about the format of the
/etc/dgateways
file, refer to The /etc/dgateways File on
page 13.
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To help manage multiple routers and to enable you to create redundant routing
schemes, the filer runs the
routed
daemon, a simple routing daemon, which is
enabled at boot time. This daemon listens for Routing Information Protocol (RIP)
packets being exchanged between routers on the network to determine which rout-
ers are alive. From the routers that are alive, the
routed
daemon selects the one
with the highest preference to use as the filers default router.
However, the filer doesnt rely on the
routed
daemon to construct the routing table.
The function of the filers
routed
daemon is to check the status of the default router.
Refer to the
route
(1),
routed
(1), and
dgateways
(1) man pages to learn more about
routing on the filer.
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