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Webcast-Catalyst9k
rj
New Member

CBWFQ QoS with new PIX

Here was the relevant original setup

2620 router:

class-map match-all classname

match access-group 101

!

policy-map Map

class classname

bandwidth 32

interface fastethernet0/0 (default gateway of LAN)

!

interface Serial0/0 (This was the PAT address that was being used for LAN hosts )

ip address x.x.x.x x.x.x.x

no ip redirects

no ip unreachables

no ip proxy-arp

ip nat inside

encapsulation ppp

no ip mroute-cache

service-policy output Map

access-list 101 permit ip any host x.x.x.x

New setup:

The new default gateway of the LAN is an internal 2620, the next hop is the PIX which now performs NAT/PAT and the final hop is the 2620 Internet router listed above. Here are my questions:

1. Does it matter that the point of NAT/PAT changed places for CBWFQ to work? Since the source IP address has changed due to PAT on the PIX, will CBWFQ still work the same way?

2. This current QoS policy only guarantees 32 kb of bandwidth to the destination host and back to the source in the event of congestion?

Thanks,

RJ

1 REPLY
Bronze

Re: CBWFQ QoS with new PIX

For point no.1, you are right. Since NAT changes the address, the CBWFQ access-list should match the translated address and not the original address for it to work. For point 2, the 32kbps bandwidth is guaranteed to this class when there is congestion. At other times, the class can use more than the configured bandwidth if available.

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