Bandwidth point on Cisco 7206VXR (NPE-G2)

[sami.poles]

After greeting...

PCI bus mb1 (Slots 1, 3 and 5) has a capacity of 600 bandwidth points.
Current configuration on bus mb1 has a total of 0 bandwidth points. 
This configuration is within the PCI bus capacity and is supported. 

PCI bus mb2 (Slots 2, 4 and 6) has a capacity of 600 bandwidth points.
Current configuration on bus mb2 has a total of 800 bandwidth points.

is there any effect on router when bandwidth points exceeded it's point like i marked above???if there is please point it to me...

[vmiller]

IOS will complain.

That is a fairly hefty oversubscription.

Depending on whats plugged in you could get some performance issues.

Expect no help from the TAC on this until you re balance.

[sami.poles]

What.? I don't understand any thing from your reply>!!!

[vmiller]

1. you should get a warning message from the router about this condition.

Without knowing what modules are in use, the best overall answer is listed above.

If you try and open a tac case on this device with the pci bus configured this way, the first thing the tac will tell you is to re balance the pci bus.

[Mohit Sahai]

Hello Sami,

Trust you are doing great.

When installing cards into a 7200, there are clear guidelines as to the order in which slots should be used, in order to maximize the available backplane bandwidth. The bandwidth is divided between two pci buses that are used to connect left and right hand cards. The available bandwidth is split between the left and right slots on the chassis. Cisco uses a system of bandwidth points, whereby the different types of interface cards have a bandwidth points value. For instance a PA-A3-OC3 card has a value of 300 points. On a 7206VXR router, the total bandwidth points for the either the left or right-hand side slots must not total more than 600 points. The bandwidth points should be evenly distributed between the left and right slots

Now from the logs which you have shared, it seems that you have installed Port Adapters on left half whose Bandwidth point sum is exceeding the 600 Bandwidth Point limit for the left side.

Effect of this:  The effect would be that the Port Adapters you have used in Left side may be working in "Half Bandwidth Point".

This would allow to use only one interface out of two in the Port Adapters.

When there is any oversubscription, below message is also displayed in "show version"

The set of PA-2FE, PA-POS-2OC3, and I/O-2FE qualify for "half
bandwidth points" consideration, when full bandwidth point counting
results in oversubscription, under the condition that only one of the
two ports is used. With this adjustment, current configuration on bus
mb1 has a total of 600 bandwidth points

 Please let me know if there is any concerns about these.

Regards,

Mohit

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