[cisco-voip] Centralized Unity QOS

[Andre Beck]

On Mon, Jan 16, 2006 at 09:53:09PM -0500, Ortiz, Carlos wrote:
> Getting back to this...(It's been a busy couple of days).  The DSCP
> method also provides the benefit of not have to search the bottom of the
> config for ACL's to see what's being prioritized.  We typically use Auto
> QOS on the switches in our network. What's the best method of verifying
> the markings are getting to the edge router as planned?  In my setup the
> Unity server is on a 3750, hits an 6500 then the edge router.  

The ultimate tool in times of doubt is probably a sniffer, but it is
not always easy to deploy a setup in which one makes sense. A quick
way of at least qualitatively proving that TOS comes through to a
remote router is temporary activation of IP precedence accounting:

#show run int fa0/0.3
interface FastEthernet0/0.3
 description Voice VLAN
 encapsulation dot1Q 3
 ip address 192.168.102.254 255.255.255.0
 ip accounting precedence input
 ip accounting precedence output
 ip pim sparse-mode
 arp timeout 300

#show int fa0/0.3 precedence 
FastEthernet0/0.3 Voice VLAN
  Input
    Precedence 0:  7792190 packets, 1426M bytes
    Precedence 3:  29803827 packets, 2001M bytes
    Precedence 5:  69033384 packets, 15049M bytes
  Output
    Precedence 0:  3828579 packets, 352222954 bytes
    Precedence 3:  19155747 packets, 1376M bytes
    Precedence 5:  70074537 packets, 15276M bytes
    Precedence 6:  1937884 packets, 226768870 bytes
    Precedence 7:  28 packets, 2856 bytes

HTH,
Andre.
-- 
                  The _S_anta _C_laus _O_peration
  or "how to turn a complete illusion into a neverending money source"

-> Andre Beck    +++ ABP-RIPE +++    IBH Prof. Dr. Horn GmbH, Dresden <-