BGP path selection

[Siddique]

Is it possible to do Application based path selection. Mean:

1. I want zoom traffic always use a specific path for incoming and outgoing for both direction.

2. Another scenario I want to zoom traffic should exit from my AS via one link and coming via another link.

For the solution I have 2 scenario:

1. single router connected with 2 ISP and 

2. 2 router connected with 2 different ISP.

[Jon Marshall]

BGP is not application aware and it does not route traffic based on source IP so basically no to both of your questions regardless of how you connect to the ISPs. 

For application aware routing you can look at PfR and for directing traffic out via a specific ISP and it returning via another you could use a combination of PBR and NAT. 

Jon

[Siddique]

Dear Jon 

Thanks for your solution.   

Is it possible to do this solution via qos ? If possible please guide me.  Thanks again.  

[Siddique]

class-map match-all ZOOM
match protocol rtp
match precedence 5
!
!
policy-map ZOOM_TRAFFIC
class ZOOM
priority 80000
!
!
interface FastEthernet0/0
ip address 1.1.1.1 255.255.255.0
duplex auto
speed auto
service-policy output ZOOM_TRAFFIC
!

Is this configuration work to achieve the goal. Please suggest me. 

Thanks

[MHM Cisco World]

Use same match but this time for PBR not for QoS

[Jon Marshall]

No you cannot achieve it by using QOS. 

PBR and NAT may be the best solution but difficult to say without knowing your full setup as using NAT may well interfere with what you already have in place. 

Jon

[MHM Cisco World]

use PBR
and match the ACL that use Zoom port number 
then set next-hop as you want.

or 
as @Jon Marshall  suggest, use PfR.