I have some 871w routers, with advanced IP services IOS, that are used to connect some branch offices to a main office. The routers connect to the Internet through a PPPoE adsl connection. A gre/ipsec tunnel connects each branch to the main office. The tunnel carries voip and various data traffic.
Data passing out of the di1 interface to the Internet consists of the tunnel traffic (voip and data) and traffic to the Internet from wireless and lan hosts. QoS is needed to ensure the tunnel has priority over the Internet bound traffic from the lan and wireless hosts. And within the tunnel voip needs priority over the data traffic.
The qos pre-classify command has been applied to the crypto map and the tunnel interface so that tunnel traffic can be placed into the fifo que of the tunnel in the correct order (priority to the voip).
My plan is to use a parent and child service policy. The child policy to handle QoS within the tunnel, the parent policy to split bandwidth between the tunnel and other Internet bound traffic.
This is a basic overview of the proposed configuration:
class-map match-all voip
match access-group 110
class-map match-all wireless
match access-group 118
class-map match-all tunnel
match access-group 115
class-map match-all data
match access-group 112
class-map match-all lan
match access-group 116
class-map match-all monitoring
match access-group 117
bandwidth percent 20
bandwidth percent 10
bandwidth percent 10
shape average percent 50
priority percent 60
bandwidth percent 25
When I try to apply the service-policy outbound to the di1 interface I receive the following message:
GTS : Not supported on this interface
- and the following is logged:
000656: Jul 27 11:17:36.289 EDT: Class Based Weighted Fair Queueing will be applied only to the Virtual-Access interfaces associated with an MLP bundle.
Will I need to enable multilink ppp? Or, is there an error in the QoS configuration? And, will the above QoS configuration give the voip priority with the tunnel, and the tunnel priority over other traffic?
Can't be sure whether it's supported or not, but it works - only thing you need to do is to enable ppp multilink on your dialer (both sides have to be configrued for multilink in order for it to work). Even if you have only single link you can still enable ppp multilink.
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