Changing A Subnet Mask - Cabletron Systems Fast Network 10 User Manual

The noRIP option allows you to turn off the routing information that
builds the routing table. You would use this option when you are
connecting network devices that do not support RIP.

4.5.3 Changing a Subnet Mask

You can optionally set the subnet mask for a port. A subnet mask is a
32-bit address mask used in IP to specify a particular subnet. If the subnet
mask is 0.0.0.0, the FN10 automatically converts the displayed mask to
the standard default, based on the port's IP address class. (Class A address
masks are 255.0.0.0, Class B address masks are 255.255.0.0, Class C
address masks are 255.255.255.0.)
To display IP addresses, subnet masks, and MAC addresses of all ports on
the FN10 you are managing, at the LCM prompt:
1. Type
ipaddr
LCM displays the current IP address table, for example:
Port IP Address
1
192.138.217.1
2
0.0.0.0
3
192.138.217.10
4
0.0.0.0
5
0.0.0.0
6
192.138.217.20
7
192.138.217.50
To change the subnet mask, at the LCM prompt:
1. Type
ipaddr <PORT-NUMBER> <IP ADDRESS> <SUBNET MASK>
For example,
subnet mask for port 6 to 255.255.240.0. LCM responds by
redisplaying the address table.
When you change the subnet mask for a port, you must also
NOTE
enter the IP address for that port. Make sure you enter the IP
address for the port correctly; whatever you enter becomes the
IP address.
To assign a new IP address, refer to Section 3.1.
Fast Network 10 User Guide
Address Mask
255.255.255.0
255.0.0.0
255.255.255.0
255.0.0.0
255.0.0.0
255.255.255.0
255.255.255.0
ipaddr 6 192.138.217.40 255.255.240.0
Using LCM to Manage the FN10
MAC Address
00:40:27:00:06:1f
00:40:27:00:06:c3
00:40:27:00:06:3e
00:40:27:00:03:7a
00:40:27:00:05:c7
00:40:27:00:04:4a
00:40:27:00:06:9e
would set the
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