Specifications

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Cisco Wide Area Application Services Command Reference
OL-11817-01
Chapter 3 CLI Commands
(config) auto-register
For autoregistration to work, you must have a DHCP server that is configured with the hostname of the
WAAS Central Manager and that is capable of handling vendor class option 43.
Note The form of DHCP used for autoregistration is not the same as the interface-level DHCP that is
configurable through the ip address dhcp interface configuration command.
The DHCP server needs to send the vendor class option (option 43) information to the WAAS device in
the format for encapsulated vendor-specific options as provided in RFC 2132. The relevant section of
RFC
2132, Section 8.4, is reproduced here as follows:
You should encode the encapsulated vendor-specific options field as a sequence of code/length/value
fields of syntax identical to that of the DHCP options field with the following exceptions:
1. There should not be a “magic cookie” field in the encapsulated vendor-specific extensions field.
2. Codes other than 0 or 255 may be redefined by the vendor within the encapsulated vendor-specific
extensions field but should conform to the tag-length-value syntax defined in section 2.
3. Code 255 (END), if present, signifies the end of the encapsulated vendor extensions, not the end of
the vendor extensions field. If no code 255 is present, then the end of the enclosing vendor-specific
information field is taken as the end of the encapsulated vendor-specific extensions field.
In accordance with the RFC standard, the DHCP server needs to send the WAAS Central Manager
hostname information in code/length/value format. (Code and length are single octets.) The code for the
WAAS Central Manager hostname is 0x01. DHCP server management and configuration are not within
the scope of the autoregistration feature.
The WAAS device sends CISCOCDN as the vendor class identifier in option 60 to facilitate device
groupings by customers.
Autoregistration DHCP also requires that the following options be present in the DHCP server’s offer to
be considered valid:
• Subnet-mask (option 1)
• Routers (option 3)
• Domain-name (option 15)
• Domain-name-servers (option 6)
• Host-name (option 12)
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. The first interface depends on
the WAE model as follows:
• For the WAE-511, WAE-512, WAE-611, WAE-612, and WAE-7320, use GigabitEthernet 1/0.
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.