03-20-2025 02:23 AM
Hi, we need to increase our ISR 4331 throughput from default 100Mbps to 1Gbps. What I know we need to purchase boost license. Can anyone please advise what is the part no. of boost license? Thanks in advance.
03-21-2025 05:28 PM
@rusy658eden wrote:
This license unlocks the full performance capabilities of the ISR 4331, enabling significantly higher throughput.
Maybe, maybe not. The latter is based on information from the Miercom report, which depends on traffic mix and router features being used. Simple IPv4 forwarding should be able to obtain the "up to" throughput, while advanced features, especially those involving crypto, appear to pretty much run the CPU flat out at 300 Mbps, i.e. the performance license level.
03-20-2025 03:18 AM
03-20-2025 04:04 AM
The part number for the boost license is FL-4330-BOOST-K9
03-20-2025 05:04 AM
The other replies have identified the license but all it does is remove the performance enforcement. It does NOT guarantee gig, if fact, it may be unable to perform better than the performance license permits.
To obtain a rough estimate of potential throughput, scale your CPU load relative to throughput. For example if 100 Mbps uses 50% CPU, 200 Mbps may be your limit, or if 100 Mbps uses 25% CPU, 400 Mbps may be your limit. Doing this, though is inexact.
Better, if available, would be to use a boost license in evaluation mode, and see how if performs for you.
03-20-2025 10:42 AM
BTW, I would recommend reading the Miercom 4k ISR performance report that can be downloaded from this web page.
The 4331 is documented and you see the cases where it struggles to provide either 100 or 300 Mbps, and cases where there's no CPU capacity left.
These are the reasons Cisco boost license performance is listed as "up to". Also why the performance level limits are defined as they are, i.e. the ISR can, more-or-less, guarantee those.
03-21-2025 06:02 AM
Thanks @Joseph W. Doherty @sdroy M02@rt37 @rusy658eden for your kind advices. I just checked the cpu utilizaiton of our isr 4331, now the utilization is around 80Mbps, the cpu utilization is 24%, only IP forward and QoS are enabled. Seems we need to change to catalyst 8000 routers if the estimated throughput will reach over 500Mbps.
03-21-2025 08:38 AM
From the Miercom Report, 24% seems high for 80 Mbps just doing IP forwarding with QoS. I would have expected no more than 10%. Does the IP forwarding also include IPv6? Is your QoS policy particularity complex?
No doubt you can obtain sufficient performance from the 8 K routers. Possibly the 11xx ISR series might be a possible candidate too.
03-21-2025 06:08 AM
Hi, we plan to purchase catalyst 8300 router. no requirement for vpn. If we want to support 1Gbps throughput, what license should we purchase? Checked the doc about 8000 license, but makes me confused, can someone please advise a direct answer? Thanks in advance. HSEC license seems not required as we won't use vpn/ipsec .
03-21-2025 06:23 AM
03-21-2025 12:34 PM
For gig, looks like you would need a tier 2 license.
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