1 / 10

Issues when translating between IPv4 and IPv6

Issues when translating between IPv4 and IPv6. Suresh Satapati Senthil Sivakumar Ronald van der Pol 56 th IETF, San Francisco March 19, 2003. Translation Problems. All problems that come with NAT NAT-PT (RFC 2766) DNS-ALG specification.

aaron-higgins
Télécharger la présentation

Issues when translating between IPv4 and IPv6

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Issues when translating between IPv4 and IPv6 Suresh Satapati Senthil Sivakumar Ronald van der Pol 56th IETF, San Francisco March 19, 2003

  2. Translation Problems • All problems that come with NAT • NAT-PT (RFC 2766) • DNS-ALG specification

  3. Desired address resolution

  4. Address resolution due to DNS-ALG

  5. Name resolution failure AAAA from v6  DNS-ALG  AAAA  A (no answer)  DNS-ALG (no answer) AAAA  DNS-ALG A or AAAA DNS resolver will ignore the subsequent answer

  6. Name resolution failure(contd.) Case 1: AAAA query  DNS-ALG  AAAA (1)  A (2) AAAA  DNS-ALG  AAAA (reply 1) Case 2: A query  DNS-ALG  AAAA AAAA  DNS-ALG  AAAA reply

  7. Name resolution failure (contd.) DNS-ALG cannot distinguish between cases 1 & 2 ‘A’ query results in a AAAA reply due to DNS-ALG Due to stateless nature…

  8. Scalability issues • Single exit point causes bottleneck. • Concern for 3GPP networks.

  9. NAT or NAT-PT • Dual stack hosts – Use NAT or NAT-PT ?

  10. WG item ?

More Related