Troubleshooting guide

1-9
Cisco Wide Area Application Services Configuration Guide
OL-26579-01
Chapter 1 Planning Your WAAS Network
About Autoregistration and WAEs
• Domain-name (option 15)
• Domain-name-servers (option 6)
• Host-name (option 12)
In contrast, interface-level DHCP requires only subnet-mask (option 1) and routers (option 3) for an
offer to be considered valid; domain-name (option 15), domain-name-servers (option 6), and host-name
(option 12) are optional. All of the above options, with the exception of domain-name-servers (option 6),
replace the existing configuration on the system. The domain-name-servers option is added to the
existing list of name servers with the restriction of a maximum of eight name servers.
Autoregistration is enabled by default on the first interface of the device. On an NME-WAE module,
autoregistration is enabled on the configured interface. On an SM-SRE module, autoregistration is
disabled by default.
Note You must disable autoregistration when both device interfaces are configured as port-channel interfaces.
If you do not have a DHCP server, the device is unable to complete autoregistration and eventually times
out. You can disable autoregistration at any time after the device has booted and proceed with manual
setup and registration.
To disable autoregistration, or to configure autoregistration on a different interface, use the no
auto-register enable command in global configuration mode.
Note Autoregistration is automatically disabled if a static IP address is configured or if interface-level DHCP
is configured on the same interface as autoregistration. (See the “Selecting Static IP Addresses or Using
Interface-Level DHCP” section on page 1-9.)
The following example disables autoregistration on the interface GigabitEthernet 1/0:
WAE(config)# no auto-register enable GigabitEthernet 1/0
Autoregistration status can be obtained by using the following show EXEC command:
WAE# show auto-register
Selecting Static IP Addresses or Using Interface-Level DHCP
During the initial configuration, you have the option of configuring a static IP address for the device or
choosing DHCP.
DHCP is a communications protocol that allows network administrators to manage their networks
centrally and automate the assignment of IP addresses in an organization’s network. When an
organization sets up its computer users with a connection to the network, an IP address must be assigned
to each device. Without DHCP, the IP address must be entered manually for each computer, and if
computers move to another location in another part of the network, the IP address must be changed
accordingly. DHCP automatically sends a new IP address when a computer is connected to a different
site in the network.
If you have a DHCP server configured, autoregistration will automatically configure the network settings
and register WAEs with the WAAS Central Manager device upon bootup.