Quality Cables & Networking Supplies	Search All Words Search Exact Phrase Search Any Word Search by Cable Connectors	SHIPPING ADDRESS: 4170 B Place NW, Auburn, WA 98001  USA View Map		MAILING ADDRESS: P.O. Box 8026, Bonney Lake, WA 98391   USA
EMAIL: Sales, Customer Service or Webmaster		PHONE: 800-931-3133 or 253-373-0800 | FAX: 253-373-0100
Hours: 9:00am - 5:00pm PST Monday - Friday
You are here: PacificCable.com 1.3. Secondary DNS Server Address

1.3. Secondary DNS Server Address

Description

This Configuration Option defines a method for negotiating with the remote peer the address of the secondary DNS server to be used on the local end of the link. If local peer requests an invalid server address (which it will typically do intentionally) the remote peer specifies the address by NAKing this option, and returning the IP address of a valid DNS server.

By default, no secondary DNS address is provided.

A summary of the Secondary DNS Address Configuration Option format is shown below. The fields are transmitted from left to right.

    0                   1                   2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |     Type      |    Length     |      Secondary-DNS-Address
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      Secondary-DNS-Address (cont) |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Type

131

Length

6

Secondary-DNS-Address

The four octet Secondary-DNS-Address is the address of the primary NBNS server to be used by the local peer. If all four octets are set to zero, it indicates an explicit request that the peer provide the address information in a Config-Nak packet.

Default

No address is provided.