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Chapter 3
Configuring the Switch IP Address and Default Gateway
Using BOOTP, DHCP, or RARP to Obtain an IP Address
For complete information on how the switch uses BOOTP, DHCP, or RARP to obtain its IP
Note
configuration, see the
To use BOOTP, DHCP, or RARP to obtain an IP address for the switch, perform this task:
Task
Step 1
Make sure that there is a DHCP, BOOTP, or
RARP server on the network.
Step 2
Obtain the last address in the MAC address range
for module 1 (the supervisor engine). This address
is displayed under the MAC-Address(es) heading.
(With DHCP, this step is necessary only if using
the manual allocation method.)
Step 3
Add an entry for each switch in the DHCP,
BOOTP, or RARP server configuration, mapping
the MAC address of the switch to the IP
configuration information for the switch. (With
DHCP, this step is necessary only if using the
manual or automatic allocation methods.)
Step 4
Set the sc0 interface IP address to 0.0.0.0.
Step 5
Reset the switch. The switch broadcasts DHCP
and RARP requests only when the switch boots
up.
Step 6
When the switch reboots, confirm that the sc0
interface IP address, subnet mask, and broadcast
address are set correctly.
Step 7
For DHCP, confirm that other options (such as the
default gateway address) are set correctly.
This example shows the switch broadcasting a DHCP request, receiving a DHCP offer, and configuring
the IP address and other IP parameters according to the contents of the DHCP offer:
Console> (enable)
Sending RARP request with address 00:90:0c:5a:8f:ff
Sending DHCP packet with address: 00:90:0c:5a:8f:ff
dhcpoffer
Sending DHCP packet with address: 00:90:0c:5a:8f:ff
Timezone set to '', offset from UTC is 7 hours 58 minutes
Timezone set to '', offset from UTC is 7 hours 58 minutes
172.16.30.32 added to DNS server table as primary server.
172.16.31.32 added to DNS server table as backup server.
172.16.32.32 added to DNS server table as backup server.
NTP server 172.16.25.253 added
NTP server 172.16.25.252 added
%MGMT-5-DHCP_S:Assigned IP address 172.20.25.244 from DHCP Server 172.20.25.254
78-13315-02
"Understanding Automatic IP Configuration" section on page
Catalyst 6000 Family Software Configuration Guide—Releases 6.3 and 6.4
Using BOOTP, DHCP, or RARP to Obtain an IP Address
Command
—
show module
—
set interface sc0 0.0.0.0
reset system
show interface
show ip route
3-2.
3-9
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Troubleshooting
