Routers/Switches from multiple vendors are available in the market but the most
commonly used is Cisco. There are multiple reasons why one selects Cisco
products over the others like stability,performance,support etc.Extra care
needs to be taken while selecting a network device.
Network architects plan and design
the network based on customer needs.They decide on which device to use, which
features should be enabled, any license required, capacity management etc. With
the expansion of business device throughput is one key factor that some times
gets overlooked and might cause a major outage or performance issues.
How this happens? for instance a
site was setup with a Cisco 1841 router and a 30 Mbps link. With time number of
users in site increased and few servers were setup which was accessed by
external users. Bandwidth is now not sufficient and they decide for a
upgrade(45 Mbps). After upgrade users complain intermittent connectivity
issues,slowness, drops etc. Service provider tests the circuit and confirms no
issue.
Where is the problem then ?
Yes,throughput now comes into picture. Cisco 1841 platform supports a
throughput of 38 Mbps and link bandwidth is 45Mbps, which means the router is
receiving more traffic that it can handle. It's like a person can juggle with 5
glasses,you start throwing additional glasses which he can not handle and will
start dropping. It's the same with Cisco devices as well. If more traffic is
received on devices than it can handle, packets will be dropped. You will also
notice the CPU utilization of the device will go high and usually IP input
process/interrupts to be consuming more of CPU.
While calculating throughput of a
device Cisco uses IP only and 64 byte packet size. Switching performance is
in packets per second. If additional features like access-list,
encryption etc are added, throughput might decreases.
1. Cisco Router performance Matrix
|
Platform
|
Process Switching
|
Process Switching
|
Fast/CEF Switching
|
Fast/CEF Switching
|
|
PPS
|
Mbps
|
PPS
|
Mbps
|
|
|
14xx
|
600
|
0.3072
|
4,000
|
2.05
|
|
160x(-R)
|
600
|
0.3072
|
4,000
|
2.05
|
|
1701
|
1,700
|
0.8704
|
12,000
|
6.14
|
|
1710
|
1,300
|
0.6656
|
7,000
|
3.58
|
|
1711-1712
|
1,700
|
0.8704
|
13,500
|
6.91
|
|
1720
|
1,400
|
0.7168
|
8,500
|
4.35
|
|
1721
|
1,700
|
0.8704
|
12,000
|
6.14
|
|
1750
|
1,400
|
0.7168
|
8,500
|
4.35
|
|
1751
|
1,500
|
0.768
|
12,000
|
6.14
|
|
1760
|
1,700
|
0.8704
|
16,000
|
8.19
|
|
1801-1812
|
|
|
70,000
|
35.84
|
|
1841
|
|
|
75,000
|
38.4
|
|
1861
|
|
|
146,142
|
74.82
|
|
1941
|
|
|
299,000
|
153.08
|
|
2500
|
800
|
0.4096
|
4,400
|
2.25
|
|
261x
|
1,500
|
0.768
|
15,000
|
7.68
|
|
262x
|
1,500
|
0.768
|
30,000
|
15.36
|
|
265x
|
2,000
|
1.024
|
40,000
|
20.48
|
|
2691
|
7,400
|
3.7888
|
70,000
|
35.84
|
|
2801
|
3,000
|
1.536
|
90,000
|
46.08
|
|
2811
|
3,000
|
1.536
|
120,000
|
61.44
|
|
2821
|
11,500
|
5.888
|
170,000
|
87.04
|
|
2851
|
15,000
|
7.68
|
220,000
|
112.64
|
|
3620
|
2,000
|
1.024
|
20,000-40,000
|
20-Oct
|
|
2901
|
|
|
327,000
|
167.42
|
|
2911
|
|
|
353,000
|
180.73
|
|
2921
|
|
|
480,000
|
245.76
|
|
2951
|
|
|
580,000
|
296.96
|
|
3640
|
4,000
|
2.048
|
50-70,000
|
25.6-36
|
|
3660
|
12,000
|
6.144
|
100-120,000
|
51.2-61.4
|
|
3631
|
4,000
|
2.048
|
50-70,000
|
25.6-36
|
|
3725
|
|
|
100-120,000
|
51.2-61.4
|
|
3745
|
|
|
225-250,000
|
25.6-36
|
|
3810
|
2,000
|
1.024
|
8,000
|
4.1
|
|
3810-V3
|
3,000
|
1.536
|
15,000
|
7.68
|
|
3825
|
25,000
|
12.8
|
350,000
|
179.2
|
|
3845
|
35,000
|
17.92
|
500,000
|
256
|
|
3925
|
|
|
833,000
|
426.49
|
|
3945
|
|
|
982,000
|
502.78
|
|
4000
|
1,800
|
0.9216
|
14,000
|
7.17
|
|
7120
|
13,000
|
6.656
|
175,000
|
89.6
|
|
7140
|
20,000
|
10.24
|
300,000
|
153.6
|
|
7200-NPE100
|
7,000
|
3.584
|
100,000
|
51.2
|
|
7200-NPE150
|
10,000
|
5.12
|
150,000
|
76.8
|
|
7200-NPE175
|
9,000
|
4.608
|
177,848
|
91.06
|
|
7200-NPE200
|
13,000
|
6.656
|
200,000
|
102.4
|
|
7200-NPE225
|
13,000
|
6.656
|
233,170
|
119.38
|
|
7200-NPE300
|
20,000
|
10.24
|
353,000
|
180.74
|
|
7300-MPLS-Experts-100
|
|
|
3,500,000(PXF)
|
1,792
|
|
7600-MSFC2
|
20,000
|
10.24
|
30,000,000
|
1,792
|
|
ASR1000-PRE4
|
|
|
10,000,000
|
5,120
|
|
12000(Engine 6)
|
|
|
50,000,000
|
20,000
|
|
CRS-1 LC
|
|
|
80,000,000
|
40,960
|
2. Cisco Switch performance
Matrix
|
Platform
|
Switch Performance(Mpps)
|
Switch Fabric(Gbps)
|
L2/L3
|
|
1900/2800
|
550,000
|
1
|
L2
|
|
2900-XL
|
3,000,000
|
3.2
|
L2
|
|
2900-LRE
|
3,000,000
|
5
|
L2
|
|
2940-8(TT,TF)
|
2,700,000
|
3.2
|
L2
|
|
2950-ST8-LRE
|
3,200,000
|
8.8
|
L2
|
|
2950-ST24-LRE
|
3,500,000
|
8.8
|
L2
|
|
2950(12,24)
|
6,600,000
|
8.8
|
L2
|
|
2950-48
|
10,100,000
|
13.6
|
L2
|
|
2950G(12,24)
|
10,100,000
|
8.8
|
L2
|
|
2950G-48
|
10,100,000
|
13.6
|
L2
|
|
2955-12(C,S)
|
2,000,000
|
13.6
|
L2
|
|
2955-12(T)
|
4,800,000
|
13.6
|
L2
|
|
2960-8
|
2,700,000
|
16
|
L2
|
|
2960-24
|
6,500,000
|
32
|
L2
|
|
2960-48
|
10,100,000
|
32
|
L2
|
|
2960G-8
|
11,900,000
|
32
|
L2
|
|
2960G-24
|
35,700,000
|
32
|
L2
|
|
2960G-48
|
39,000,000
|
32
|
L2
|
|
2970G-24(T)
|
35,700,000
|
24
|
L2
|
|
2970G-24(TS)
|
38,700,000
|
28
|
L2
|
|
3500-XL
|
8,000,000
|
10.8
|
L2
|
|
3550-24
|
6,600,000
|
8.8
|
L3
|
|
3550-48
|
10,100,000
|
13.6
|
L3
|
|
3550-12T/G
|
17,000,000
|
24
|
L3
|
|
3560-24TS/PS
|
6,600,000
|
8.8
|
L3
|
|
3560-48TS/PS
|
13,100,000
|
17.6
|
L3
|
|
3560G-24TS/PS
|
38,700,000
|
32
|
L3
|
|
3560G-48TS/PS
|
38,700,000
|
32
|
L3
|
|
3560E-24TD/PD
|
65,500,000
|
128
|
L3
|
|
3560E-48TD/PD
|
101,200,000
|
128
|
L3
|
|
3750-24TS/PS
|
6,500,000
|
32
|
L3
|
|
3750-48TS/PS
|
13,100,000
|
32
|
L3
|
|
3750G-24TS/PS
|
38,700,000
|
32
|
L3
|
|
3750G-48TS/PS
|
38,700,000
|
32
|
L3
|
|
3560E-48TD/PD
|
101,200,000
|
128
|
L3
|
|
3750G-24T
|
35,700,000
|
32
|
L3
|
|
3750G-12S
|
17,800,000
|
32
|
L3
|
|
3750G-16TD
|
35,700,000
|
32
|
L3
|
|
3750E-24TD/PD
|
65,500,000
|
128
|
L3
|
|
3750E-48TD/PD
|
101,200,000
|
128
|
L3
|
|
2948G/2980G/4912
|
18,000,000
|
24
|
L2
|
|
2948G-L3
|
10,000,000
|
22
|
L3
|
|
2948G-GE-TX
|
29,760,000
|
20
|
L2
|
|
2948G/2980G/4912
|
18,000,000
|
24
|
L2
|
|
2948G-L3
|
10,000,000
|
22
|
L3
|
|
2948G-GE-TX
|
29,760,000
|
20
|
L2
|
|
4003w/Sup I
|
18,000,000
|
24
|
L2
|
|
4006 w/Sup II
|
18,000,000
|
24x3
|
L2
|
|
4006 w/SupIII or IV
|
48,000,000
|
64
|
L3
|
|
4503 w/Sup II
|
18,000,000
|
24
|
L2
|
|
4503 w/Sup III/IV
|
21,000,000
|
28
|
L3
|
|
4503 w/Sup II-Plus-TS
|
48,000,000
|
64
|
L3
|
|
4506 w/Sup II
|
18,000,000
|
24
|
L3
|
|
4506 w/Sup III/IV
|
48,000,000
|
64
|
L3
|
|
4X06/4503/4507-R
|
48,000,000
|
64
|
L3
|
|
4507 w/SupIV
|
48,000,000
|
64
|
L3
|
|
45XX/4006 w/SupV
|
72,000,000
|
96
|
L3
|
|
45XX w/SupV-10GE
|
102,000,000
|
136
|
L3
|
|
4908G-L3(L2/L3)
|
11,000,000
|
22
|
L3
|
|
4948
|
72,000,000
|
96
|
L3
|
|
5500-SupI/II
|
1,000,000
|
1.2
|
L3
|
|
5500-SupIII
|
2,200,000
|
3.6
|
L3
|
|
600X,65XX Sup1/1A
|
15,000,000
|
32
|
L2
|
|
600X,65XX Sup1/1A-MSFC
|
15,000,000
|
32
|
L3
|
|
65XX/76XX Sup32
|
15,000,000
|
32
|
L3
|
|
65XX/76XX Sup2
|
30,000,000
|
256
|
L2
|
|
65XX/76XX Sup2-MSFC
|
30,000,000
|
256
|
L3
|
|
65XX/76XX-w/Sup 720
|
400,000,000
|
720
|
L3
|
|
8510(IP/IPX/IPMC/Bridging)
|
6,000,000
|
10
|
L3
|
|
8540(IP/IPX/IPMC/Bridging)
|
24,000,000
|
40
|
L3
|
Nicely done..
ReplyDeleteNicely done..
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