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How do I assign a certain bandwidth for a certain traffic?

Posted on 2009-06-27
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Last Modified: 2012-05-07
the scenario as attached I have Bandwidth of 30 MB between the two sites.
how can I assign bandwidth of 2MB between LAN A-1 & LAN B-1. and 28MB between LAN A-2 & LAN B-2



Assign-BW.jpg
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Question by:paintco
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9 Comments
 
LVL 28

Expert Comment

by:asavener
ID: 24727570
Depends on your hardware.  QoS configurations are hardware specific, so we need to know what models of routers you are using.
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Author Comment

by:paintco
ID: 24727796
3800 and 2800
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LVL 28

Accepted Solution

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asavener earned 500 total points
ID: 24728194
OK, here are the basic steps:

1.  Create access list(s) that match the traffic you want to police
2.  Create class map(s)
3.  Create a policy map
4.  Apply the policy map to the interface

ip access-list extended Match_LanA1-LANB1
permit 10.10.10.0 0.0.0.255 30.30.30.0 0.0.0.255

ip access-list extended Match_LANA2-LANB2
permit 20.20.20.0 0.0.0.255 40.40.40.0 0.0.0.255

class-map match-any LANA1-LANB1
match access-group Match_LanA1-LANB1

class-map match-any LANA2-LANB2
match access-group Match_LanA2-LANB2

policy-map Police_Traffic
class LANA1-LANB1
police cir 2000000 bc 3125000 be 3125000
  conform-action set-prec-transmit 3
  exceed-action drop
 class LANA2-LANB2
police cir 38000000 bc 3125000 be 3125000
  conform-action set-prec-transmit 3
  exceed-action drop
 
 
 
interface <outside-interface-name>
service-policy output Police_Traffic



Then repeat on the other router, but with the direction of traffic in the access lists reversed.
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Author Comment

by:paintco
ID: 24728777
Is there a required IOS to configure this steps
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Author Comment

by:paintco
ID: 24730283
suppose I have in A more networks which going to other sites (RTR-C, RTR-D, RTR-E). I want only to assign bandwidth between a certain network in site A (LANA-1) and site B (LANB-1) to use only 2MB and the rest of bandwidth to be shared for other remaining networks
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LVL 28

Expert Comment

by:asavener
ID: 24730311
Policing limits the traffic to the assigned bandwidth.  The rest of the bandwidth is available for all other traffic.

If the policed traffic hasn't hit its limit, then its bandwidth is available for use as well.
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Author Comment

by:paintco
ID: 24731242
please can you explain what does these lines means

police cir 2000000 bc 3125000 be 3125000
 conform-action set-prec-transmit 3
 exceed-action drop
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Author Comment

by:paintco
ID: 24731244
Also can I namage the bandwidth from the Juniper
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LVL 28

Expert Comment

by:asavener
ID: 24731495
That should all be one line.

The bc and be values need to be modified; I copied the line from another configuration where the bandwidth was actually 100,000,000 kbps.

Reduce them to 62500.

The lines mean:  Set the committed information rate (CIR) to 2 Mbps, if the traffic is under 2Mbps (conform action) then transmit, if the traffic is over 2Mbps then drop the packet.



I'm not familiar enough with the Juniper appliance to tell you one way or the other.
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