ISR吞吐性能问题

ISR大致可以分几类：

Cisco 860、880、890

ISR1800 (fixed)、1800 (modular)、2800、3800 Series

ISR1900、2900、3800、3900 Series

ISR4K

每一代的设备，设备的性能肯定都不一样，本摘要，将主要记录ISR的吞吐性能问题。

1、下图主要体现的是800 Series和1900、2900、3900 Series，厂商建议的WAN最大throughput，该建议应适合大多数企业和商业客户：

Table 2. Cisco ISR G2 key benfits over the ISR G1

Key Benefits	Cisco ISR	Cisco ISR G2
WAN Performance	Up to 45Mbps with Services	Up to 350Mbps with Services
Network Processor	Single Core	Multicore
Service Module Performance and Capacity	Up to 160GB storage	Up to 7X with dual core and 1TB of storage
On-board DSPs	Voice	Voice + Video
Integrated Switching	Fast Ethernet with POE. Based on Catalyst 3560/3750	FE/GE Ethernet with EPOE Based on Catalyst 3560X /2960S
IOS Image	Multiple	Single Universal IOS image
Service Delivery	Hardware Coupled	Services On-Demand
Redundancy	Single Motherboard	Field upgradeable Motherboards (3900 Series), Redundant power supplies
Key Benefits[?]	EnergyWise	EnergyWise with slot based controls

该参数，基本也可以从Datasheet中查询得到，如1900和2900：

Table 1.       Key Features and Benefits of the Cisco 1921 Integrated Services Router

High performance with integrated services

●  The Cisco 1900 Series enables deployment in high-speed WAN environments with concurrent services enabled up to 15 Mbps.

Table 1.       Key Features and Benefits of the Cisco 1941 Integrated Services Router Series

High Performance with Integrated Services

●  The Cisco 1900 Series enables deployment in high speed WAN environments with concurrent services enabled up to 25 Mbps. ●  Multi-Gigabit Fabric enables high bandwidth module to module communication without compromising routing performance.

Table 1.       Key Business Benefits of the Cisco 2900 Series Integrated Services Routers

High Performance with Integrated Services

●  The Cisco 2900 Series enables deployment in high speed WAN environments with concurrent services enabled up to 75 Mbps. ●  A MultigiGabit Fabric (MGF) enables high-bandwidth module-to-module communication without compromising routing performance.

2、下图主要针对ISR4K的WAN throughput：

三种性能级别：

Platform	Factory Default	Performance License	Boost License
4451	1Gbps	2 Gbps @ 19% CPU	4 Gbps* @ 35% CPU
4431	500Mbps	1 Gbps @ 18% CPU	4 Gbps* @ 62% CPU
4351	200Mbps	400 Mbps @ 17% CPU	2 Gbps* @ 45% CPU
4331	100Mbps	300 Mbps @ 16% CPU	2 Gbps* @ 53% CPU
4321	50Mbps	100 Mbps @ 8% CPU	2 Gbps* @ 68% CPU
4221	35Mbps	75 Mbps @ 8% CPU	1.4 Gbps @ 94% CPU

Datasheet中也有记录：

Table 4.             Specifications of Cisco 4000 Family Integrated Services Routers

Technical Specifications	Cisco 4461	Cisco 4451	Cisco 4431	Cisco 4351	Cisco 4331	Cisco 4321	Cisco 4221
Aggregate Throughput (Default)	1.5Gbps	1 Gbps	500 Mbps	200 Mbps	100 Mbps	50 Mbps	35Mbps
Aggregate Throughput (Performance License)	3Gbps	2 Gbps	1 Gbps	400 Mbps	300 Mbps	100 Mbps	75 Mbps
Aggregate CEF Only[5] Throughput (Boost License)	Over 7Gbps	Over 4Gbps	Over 4Gbps	Over 2Gbps	Over 2Gbps	1.5Gbps	1.2Gbps

如果需要提升throughput，对license的需求如下：

Table 6.             Cisco ISR 4000 Performance Licenses

Platform	Performance-on-Demand License	Features
ISR4461	FL-4460-PERF-K9	Increases the performance from base performance 1.5 Gbps to 3 Gbps
ISR4451	FL-44-PERF-K9	Increases the performance from base performance 1 Gbps to 2 Gbps
ISR4431	FL-44-PERF-K9	Increases the performance from base performance 500 Mbps to 1 Gbps
ISR4351	FL-4350-PERF-K9	Increases the performance from base performance 200 Mbps to 400 Mbps
ISR4331	FL-4330-PERF-K9	Increases the performance from base performance 100 Mbps to 300 Mbps
ISR4321	FL-4320-PERF-K9	Increases the performance from base performance 50 Mbps to 100 Mbps
ISR4221	FL-4220-PERF-K9	Increases the performance from base performance 35 Mbps to 75 Mbps

Table 7.             Cisco ISR 4000 Booster (boost) Performance Licenses

Part number	Description
FL-4220-BOOST-K9 (=)	Booster Performance License for 4220 Series Router
FL-4320-BOOST-K9 (=)	Booster Performance License for 4320 Series Router
FL-4330-BOOST-K9 (=)	Booster Performance License for 4330 Series Router
FL-4350-BOOST-K9 (=)	Booster Performance License for 4350 Series Router
FL-4430-BOOST-K9 (=)	Booster Performance License for 4430 Series Router
FL-44-BOOST-K9 (=)	Booster Performance License for 4450 Series Router
FL-4460-BOOST-K9 (=)	Booster Performance License for 4460 Series Router