Aggregate Throughput

[Romeo Yong]

Hi guys,

Can someone help me understand what is meant by aggregate throughput as it relates to the ISR 4431 series routers. Is this aggregate throughput for WAN or LAN?

Thanks

[Reza Sharifi]

Hi,

Aggregated throughput is usually for the whole box including LAN and WAN interfaces.

HTH

[Romeo Yong]

Hi Reza,

Thanks for the quick response.

How does that aggregate throughput affect traffic being routed between 2 LANs, that are 1Gbps wire speed?

I'm looking at using one of these routers between 2 LANs.

Thanks

[Reza Sharifi]

Hi,

For 2 vlans, you should be fine. The performance for 4431 is 500Mb and upgradeable to 1Gig.  

Here is the matrix for comparison. What application are you using that requires line rate speed?

https://www.cisco.com/c/en/us/products/routers/4000-series-integrated-services-routers-isr/models-comparison.html

HTH

[Romeo Yong]

Thanks.

Well its 2 physical LANs (two separate buildings).

They will both have IP Phones, CCTV, file sharing, inventory management and finance application.

[Reza Sharifi · Accepted solution]

It should work fine. If this is just for vlan routing and you have not purchased the hardware yet, you may want to look at the 6800 series instead. This is if you don't need NAT, GRE tunnel, not facing the internet directly, etc.. 

Also, for redundancy, you probably need 2 devices.  Here is the data sheet for the 6800 series:

https://www.cisco.com/c/en/us/products/switches/catalyst-6800-series-switches/datasheet-listing.html

HTH

[Romeo Yong]

Thanks Reza.

Will check it out.

[asisfontes1]

Wrong... if you are expecting to get 1Gbps for transactions between any of the router cards it seems the aggregated throughput is indeed your bottleneck. I bought ISR4331s and I cannot go beyond 100Mbps (the default speed)... Lame!

[mikeleebrla]

The throughput performance for the 4000 series ISRs is posted in this thread and it clearly states that it's 100 Mbps and is upgrade-able to 300 Mbps. 

If you run either of the following commands on a 4000 it will show this.

sh platform hardware throughput level

show license feature

https://www.cisco.com/c/en/us/products/routers/4000-series-integrated-services-routers-isr/models-comparison.html

[Joseph W. Doherty]

It's the maximum bandwidth that can pass through the router. It's the sum of all the interfaces ingress bandwidth (possibly not including ingress bandwidth dropped by an ingress ACL).

On the ISR 4K series the bandwidth is an artificial performance limit imposed by a license. Generally, regardless of your configuration or traffic mix the ISR can achieve that throughput. However, somewhat recently, Cisco has provided a "boost" license that removes the logical performance cap. With that license, your throughput capacity will depend on your configuration, the actual traffic and the physical capacity of the hardware (much like the prior ISR generation).

[akbashir]

Aggregate throughput is the sum of both the traffic received on the interfaces and transmitted when operating in Full Duplex mode .

While the Nominal throughput is the Sum of traffic transmitted (egress) on all interfaces , The ISR 4k has nominal throughput, you can find the traffic transmitted and received on interfaces using

#show interfaces summary

TXBS --- Transmitted traffic

RXBS --- Received traffic

[Joseph W. Doherty]

Sorry, but what you're saying is unclear, to me.

Let's say you're using just two gig ports, both full duplex.  Both ports have a gig ingress rate being forwardef to the other port's egress.  Is the aggregate 2 or 4 gig?  If a 4k router has a 2 gig performance limit, would all the traffic be forwarded or would it be limited by half?

If "nominal" bandwidth is egress bandwidth, is such egress bandwidth what's being actually transmitted or what's directed toward the egress interface?  (Basically does egress discards for queue overflow and/or ACL impact TXBS and/or "nominal"?)