Quick Reference Guide

596 PowerConnect B-Series TI24X Configuration Guide
53-1002269-02
Configuring IP parameters – Layer 3 Switches
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To disable ICMP Host Unreachable messages but leave the other types of ICMP Unreachable
messages enabled, enter the following commands instead of the command shown above.
PowerConnect(config)#no ip icmp unreachable host
If you have disabled all ICMP Unreachable message types but you want to re-enable certain types,
for example ICMP Host Unreachable messages, you can do so by entering the following command.
PowerConnect(config)#ip icmp unreachable host
Configuring static routes
The IP route table can receive routes from the following sources:
• Directly-connected networks – When you add an IP interface, the Layer 3 Switch automatically
creates a route for the network the interface is in.
• RIP – If RIP is enabled, the Layer 3 Switch can learn about routes from the advertisements
other RIP routers send to the Layer 3 Switch. If the route has a lower administrative distance
than any other routes from different sources to the same destination, the Layer 3 Switch
places the route in the IP route table.
• OSPF – Refer to RIP, but substitute “OSPF” for “RIP”.
• Default network route – A statically configured default route that the Layer 3 Switch uses if
other default routes to the destination are not available. Refer to “Configuring a default
network route” on page 604.
• Statically configured route – You can add routes directly to the route table. When you add a
route to the IP route table, you are creating a static IP route. This section describes how to add
static routes to the IP route table.
NOTE
On PowerConnect B-Series TI24X devices, this feature is supported.
Static route types
You can configure the following types of static IP routes:
• Standard – the static route consists of the destination network address and network mask,
and the IP address of the next-hop gateway. You can configure multiple standard static routes
with the same metric for load sharing or with different metrics to provide a primary route and
backup routes.
• Interface-based – the static route consists of the destination network address and network
mask, and the Layer 3 Switch interface through which you want the Layer 3 Switch to send
traffic for the route. Typically, this type of static route is for directly attached destination
networks.
• Null – the static route consists of the destination network address and network mask, and the
“null0” parameter. Typically, the null route is configured as a backup route for discarding traffic
if the primary route is unavailable.
Static IP route parameters
When you configure a static IP route, you must specify the following parameters:
• The IP address and network mask for the route destination network.