我有几个 Cisco 1721 和一个 WIC-4ESW。我正在运行另一家公司的家用路由器作为我的有线路由器，但决定将其变成无线网桥并使用我额外的思科作为我的路由器。我最近通过我的提供商升级了我的服务计划，从 8M 降到了 18M。在他们对我的电缆调制解调器做了他们需要的事情之后，我没有注意到速度上有任何差异。我的提供商在他们的网络上有一个速度测试服务器来测试，所以我开始测试我的速度，我仍然会在凌晨 2:00 下降 6-8M。
我将我的计算机直接连接到电缆调制解调器并运行了几次测试，并注意到我几乎每次都下降了大约 18M。我把思科重新打开，回到 6M 下来。试了大约3次。
我检查了 Cisco 上的所有接口，没有错误，也没有任何异常。然后，我使用完全相同的电缆，让我的其他公司生产 路由器而不是网桥，并再次运行测试...... 18M 下降了 3 次。
谁能告诉我为什么我的 Cisco 速度如此之慢？
我什至尝试从旧式 NAT 切换到 NVI，但这似乎更慢......
我还尝试更改外部接口的 MAC 地址，认为我的提供商可能正在对我从 DHCP 获得的源地址执行 QOS。
谢谢，
肖恩
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"
This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use encryption.
Importers, exporters, distributors and users are responsible for
compliance with U.S. and local country laws. By using this product you
agree to comply with applicable laws and regulations. If you are unable
to comply with U.S. and local laws, return this product immediately.
A summary of U.S. laws governing Cisco cryptographic products may be found at:
http://www.cisco.com/wwl/export/crypto/tool/stqrg.html
If you require further assistance please contact us by sending email to
[email protected].
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
编辑：回应 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
在使用我的提供商的服务器进行速度测试期间
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
速度测试完成后直接。
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