Great - thanks Reese - that's perfect. N. ________________________________
From: Borel, Reese [mailto:[email protected]] Sent: 24 September 2009 15:21 To: Enterasys Customer Mailing List Subject: RE:[enterasys] DHCP Option 43 for Wireless Nick, Page 10-4 of the “RASM Configuration Guide”. APs and DHCP Option 43 The DHCP option 43 field in a DHCP Offer message can provides a simple and effective way for APs to find RoamAbout Switches across an intermediate Layer 3 network, and is especially useful in networks that are geographically distributed or have a flat domain name space. You can use the DHCP option 43 field to provide a list of RoamAbout Switch IP addresses, without the need to configure DNS servers. To use DHCP option 43, configure the option to contain a comma‐separated list of RoamAbout Switch IP addresses or hostnames, in the following format: ip:ip-addr1,ip-addr2,... or host:hostname1,hostname2,... You can use an IP address list or a hostname list, but not both. If the list contains both types of values, the AP does not attempt to use the list. Note: STP on a port directly connected to an AP can prevent the AP from booting. AP Overview RoamAbout Mobility System Software Configuration Guide 10-5 The ip and host keywords can be in lowercase, uppercase (IP or HOST), or mixed case (example: Ip, Host, and so on.) You can use spaces after the colon or commas, but spaces are not supported within IP addresses or hostnames. Leading zeroes are supported in IP addresses. For example, 100.130.001.1 is valid. Valid characters in hostnames are uppercase and lowercase letters, numbers, periods ( . ), and hyphens ( ‐ ). Other characters are not supported. If you use the host option, you must configure the network’s DNS server with address records that map the hostnames in the list to the RoamAbout Switch IP addresses. After receiving a DHCP Offer containing a valid string for option 43, an AP sends a unicast Find Switch message to each RoamAbout Switch in the list. Refer to “How an AP Contacts a RoamAbout Switch (DHCP‐Obtained Address)” on page 10‐7 for a description of this process. No configuration is required on the RoamAbout Switch itself. Thanks, Reese From: Nick Allen [mailto:[email protected]] Sent: Thursday, September 24, 2009 8:53 AM To: Enterasys Customer Mailing List Subject: [enterasys] DHCP Option 43 for Wireless Hi, I'm trying to track down the documentation for configuring option 43 in DHCP for the wireless AP's to know where our RBT switches are. We currently have a single DNS entry for wlan-switch, but we have 2 x RBT switches, so need to give the AP's a failover option and I'm not sure you can do this using the DNS method? Can anyone point me at the correct documentation for this? Thanks, Nick. This e-mail is intended only for the named person or entity to which it is addressed and contains valuable business information that is proprietary, privileged, confidential and/or otherwise protected from disclosure. If you received this e-mail in error, any review, use, dissemination, distribution or copying of this e-mail is strictly prohibited. Please notify us immediately of the error via e-mail to [email protected] and please delete the e-mail from your system, retaining no copies in any media. We appreciate your cooperation. * --To unsubscribe from enterasys, send email to [email protected] with the body: unsubscribe enterasys [email protected] * --To unsubscribe from enterasys, send email to [email protected] with the body: unsubscribe enterasys [email protected] --- To unsubscribe from enterasys, send email to [email protected] with the body: unsubscribe enterasys [email protected]
