Re: QoS and bandwidth throttling in IPSEC networks

[Arjan Vos <arjan () pino demon nl>]

On Thu, 4 Mar 1999, Jyri Kaljundi wrote:

> More of encryption questions than firewalls, but this does get mixed quite
> often nowadays:
>
> How are the Quality of Service and bandwidth throttling issues handled in
> LAN to LAN encryption products? 
>
> How are these issues generally handled in IPSEC packets, like how can
> ISP's and public networks offer QoS for encrypted IPSEC packets? Is it
> possible to tag the packets (like voice, low quality, e-mail etc) and is
> there and RFC on this?

QoS is not a function within IP or IPsec. There are some mechanisms like,
for example, RSVP (Resource Reservation Protocol) that give TCP/IP
applications a possibility to reserve a minimum of bandwidth or a
maximum delay that can be tolerated.
Some ISPs offer VPN services on their (Internet) backbones with QoS
defined, but the QoS function will then be defined within the carriers,
such as Frame Relay or ATM.

Gr, Arjan

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