I have a few Cisco 1721s and a WIC-4ESW. I was running another companies home router as my cable router, but decided to turn that into a wireless bridge and use my extra Cisco as my router. I recently upgraded my service plan with my provider to go from 8M down to 18M down. After they did what they needed to my cable modem I didn't notice any difference in the speed. My provider has a speed test server on their network to test with so I started testing my speed and I will still getting only 6-8M down at 2:00am.
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I connected my computer directly to the cable modem and ran the test a few more times and noticed that I was getting about 18M down almost everytime. I put the Cisco back on, back to 6M down. Tried about 3 times.
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I checked all the interfaces on the Cisco, no errors, or anything unusual. I then used the exact same cables and made my other companies product the router instead of a bridge and ran the tests again… 18M down, three times.
Can anybody tell me why my Cisco is slowing things down so much?
I even tried switching from the old style NAT to NVI, but that seemed even slower…
I also tried to change the MAC address of the outside interface thinking that my provider might be doing QOS on the source address I was getting from DHCP.
Thanks,
Shawn
Cisco IOS Software, C1700 Software (C1700-ADVIPSERVICESK9-M), Version 12.4(25d))
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2010 by Cisco Systems, Inc.
Compiled Wed 18-Aug-10 04:02 by prod_rel_team
ROM: System Bootstrap, Version 12.2(7r)XM2, RELEASE SOFTWARE (fc1)
router uptime is 30 minutes
System returned to ROM by reload at 06:27:19 UTC Fri Aug 9 2013
System image file is "flash:c1700-advipservicesk9-mz.124-25d.bin"
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Cisco 1721 (MPC860P) processor (revision 0x500) with 118050K/13022K bytes of me.
Processor board ID FOC09421G3V (436675680), with hardware revision 0000
MPC860P processor: part number 5, mask 2
1 Ethernet interface
5 FastEthernet interfaces
32K bytes of NVRAM.
32768K bytes of processor board System flash (Read/Write)
Configuration register is 0x2102
-------------------------------------------------------------------------------
router#sho inventory
NAME: "1721 chassis", DESCR: "1721 chassis, Hw Serial#: 436675680, Hw Revision:"
PID: 1721 , VID: 0x500, SN: FOC09421G3V (436675680)
NAME: "Chassis Slot", DESCR: "1700 Chassis Slot"
PID: 1700 Chassis Slot , VID: , SN:
NAME: "C1721 Mainboard", DESCR: "C1721 Mainboard"
PID: C1721 Mainboard , VID: 0x500, SN: FOC09421G3V (436675680)
NAME: "Daughter card slot:0", DESCR: "1700 DaughterCard Slot"
PID: 1700 DaughterCard Slot, VID: , SN:
NAME: "WAN Interface Card - 4 Port FE Switch", DESCR: "WAN Interface Card - 4 P"
PID: WIC-4ESW= , VID: 1.0, SN: FOC09144DZ1
NAME: "Ethernet0", DESCR: "PQUICC Ethernet"
PID: PQUICC Ethernet , VID: , SN:
NAME: "FastEthernet1", DESCR: "Fast Ethernet"
PID: Fast Ethernet , VID: , SN:
NAME: "FastEthernet2", DESCR: "Fast Ethernet"
PID: Fast Ethernet , VID: , SN:
NAME: "FastEthernet3", DESCR: "Fast Ethernet"
PID: Fast Ethernet , VID: , SN:
NAME: "FastEthernet4", DESCR: "Fast Ethernet"
PID: Fast Ethernet , VID: , SN:
NAME: "Daughter card slot:1", DESCR: "1700 DaughterCard Slot"
PID: 1700 DaughterCard Slot, VID: , SN:
NAME: "FastEthernet0", DESCR: "PQUICC_FEC"
PID: PQUICC_FEC , VID: , SN:
--------------------------------------------------------------------------------
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
!
hostname router
!
boot-start-marker
boot-end-marker
!
logging buffered 60000 debugging
logging console critical
enable secret 5 xxx
!
aaa new-model
!
aaa authentication login default local
!
aaa session-id common
ip cef
!
ip domain name toad-host.com
ip auth-proxy max-nodata-conns 3
ip admission max-nodata-conns 3
!
username xxx
!
ip ssh version 2
!
interface FastEthernet0
mac-address 0004.4b16.8271
ip address dhcp
ip nat outside
ip virtual-reassembly
speed 100
full-duplex
!
interface FastEthernet1
description Inside
switchport access vlan 100
!
interface FastEthernet2
shutdown
!
interface FastEthernet3
shutdown
!
interface FastEthernet4
shutdown
!
interface Vlan1
no ip address
shutdown
!
interface Vlan100
ip address 192.168.1.1 255.255.255.0
ip nat inside
ip virtual-reassembly
!
ip forward-protocol nd
!
ip dns server
!
no ip http server
no ip http secure-server
ip nat inside source list 100 interface FastEthernet0 overload
ip nat inside source static tcp 192.168.1.10 22 interface FastEthernet0 22
!
logging trap debugging
logging 192.168.1.10
access-list 10 permit 192.168.1.0 0.0.0.255 log
access-list 10 deny any log
access-list 100 permit ip any any
!
control-plane
!
line con 0
logging synchronous
line aux 0
line vty 0 4
access-class 10 in
logging synchronous
transport input ssh
line vty 5 15
access-class 10 in
logging synchronous
transport input ssh
!
ntp clock-period 17180034
ntp server 192.5.41.41
ntp server 192.5.41.40
end
Edit: In response to Paul Rudnitskiy
router#sho ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is 24.49.40.1 to network 0.0.0.0
172.16.0.0/32 is subnetted, 1 subnets
S 172.16.100.4 [254/0] via 24.49.40.1, FastEthernet0
24.0.0.0/22 is subnetted, 1 subnets
C 24.49.40.0 is directly connected, FastEthernet0
C 192.168.1.0/24 is directly connected, Vlan100
S* 0.0.0.0/0 [254/0] via 24.49.40.1
During the speed test with my provider's server
CPU utilization for five seconds: 34%/32%; one minute: 7%; five minutes: 4%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
39 39132 700 55902 0.65% 0.10% 0.06% 0 Per-minute Jobs
163 1804 336 5369 0.40% 0.98% 0.40% 0 DNS Server Input
9 1512 4110 367 0.24% 0.58% 0.33% 0 ARP Input
162 1908 14331 133 0.16% 0.69% 0.37% 0 DNS Server
48 828 1873 442 0.16% 0.23% 0.14% 0 IP Input
151 60 53 1132 0.08% 0.01% 0.00% 0 Syslog
Directly after the speed test finished.
CPU utilization for five seconds: 3%/3%; one minute: 8%; five minutes: 5%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
9 1580 4245 372 0.40% 0.51% 0.33% 0 ARP Input
48 840 1895 443 0.16% 0.19% 0.14% 0 IP Input
67 52 753 69 0.08% 0.00% 0.00% 0 IP Background
1 12 12 1000 0.00% 0.00% 0.00% 0 Chunk Manager
2 104 8376 12 0.00% 0.00% 0.00% 0 Load Meter
3 4 412 9 0.00% 0.00% 0.00% 0 Spanning Tree
4 4 1 4000 0.00% 0.00% 0.00% 0 EDDRI_MAIN
5 102004 6382 15983 0.00% 0.22% 0.23% 0 Check heaps
Best Answer
According to http://www.cisco.com/web/partners/downloads/765/tools/quickreference/routerperformance.pdf
The 1721's peak throughput capability is 12,000 packets per second and packets are at most 1,500 bytes.
This means that under ideal, perfect conditions, the 1721 maxes out at 17Mbps. NAT, and small packets approximately halves that. The data sheet says that CEF performance is 6.14Mbit/s.
The 1721 was intended to handle data at T1 speeds.