[cisco-voip] Can we resolve tftp option 150 via a DNS lookup

[Ryan Ratliff]

Option 150 is specific to Cisco devices so I'm not surprised it's not in the
DHCP RFC.
Setting a hostname there should work as long as the phone is able to resolve
it correctly. 
 

-Ryan 

 

  _____  

From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of FrogOnDSCP46EF
Sent: Tuesday, November 18, 2008 10:01 PM
To: cisco-voip at puck.nether.net
Subject: [cisco-voip] Can we resolve tftp option 150 via a DNS lookup


Have anyone tried DNS server instead of Array to achieve redundancy?

Let's say we've 2 x TFTP server for redundancy purpose.
TFTP1 - 1.1.1.1
TFTP2- 1.1.1.2

normally TFTP redundancy is achieved by creating Array in DHCP. Put both
TFTP server ip address in the DHCP.
array: 10.1.1.1 10.1.1.2

Instead of putting those IP address in the array in DHCP config can I put
one DNS like name?

Array: tftp1tftp2 or tftp.cisco.com
In DNS - tftp.cisco.com has 2 hosts associated to it e.g. 10.1.1.1 and
10.1.1.2-- 

The DHCP RFC tells that ICMP is the one which finds out TFTPS erver's subnet
but no mention about DNS address for option 150.


Smile, you'll save someone else's day!
Frog

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