Tech Support > Computer Hardware > Routers > Cisco 3640 NM-4E Westell ADSL Modem & Ambit Cable Modem/Router Half 1/2 Speed
Cisco 3640 NM-4E Westell ADSL Modem & Ambit Cable Modem/Router Half 1/2 Speed
Posted by Chris on June 4th, 2006


I have a Cisco 3640 connected to a Westell ADSL Modem and an Ambit
Cable Modem/Router. I recently upgrade to 7.0Mb x 768Kb on each. I
used to have 3.0Mb x 768K on ADSL and 2.0Mb x 384K on Cable. Both have
static IP addresses.

When I connect either modem directly to a PC the speed is fine. This
worked before I upgraded and after.

Previously, when I connect the modems to my router through my NM-4E
(E2/0 and E2/3) card the speed was fine, I gave up about 15%
throughput based upon my configuration. I can live with that.

Currently, after the upgrade to 7.0Mb down, my speed is effectively
cut in half. Approximately 2.7 to 2.8 down, up is fine at 720Kb.

I understand that my configuration is restrictive, so I configured my
NM-1FE-TX (F0/0) to be bare bones, least restrictive. When I did this
my speed improved to almost exactly half.

I have been to Cisco website for hours, Google, here, all to no avail.

Any help would be greatly appreciated.

Below the configuration are my SH Interface and SH IP Interface
outputs.

Following is my configuration:

Building configuration...

Current configuration: 6437 bytes
!
! Last configuration change at 09:32:49 PDST Sun Jun 4 2006 by
(redacted)
! NVRAM config last updated at 17:30:59 PDST Sat May 27 2006 by
(redacted)
!
version 12.4
no service pad
service tcp-keepalives-in
service tcp-keepalives-out
service timestamps debug datetime msec localtime show-timezone
service timestamps log datetime msec localtime show-timezone
service password-encryption
service compress-config
no service dhcp
!
hostname CISCO3640
!
boot-start-marker
boot-end-marker
!
logging count
logging buffered 4096 debugging
enable secret (redacted)
!
aaa new-model
!
!
aaa authentication login default local
aaa authorization exec default local
!
aaa session-id common
!
resource policy
!
clock timezone Pacific -8
clock summer-time PDST recurring
ip subnet-zero
no ip source-route
!
ip cef
ip domain name (redacted)
ip name-server (redacted)
ip name-server (redacted)
ip name-server (redacted)
ip name-server (redacted)
no ip dhcp use vrf connected
!
no ip bootp server
no ip ips deny-action ips-interface
ip ips signature 4050 0 disable
ip ips name ids-perimeter
ip scp server enable
!
username (redacted) privilege 15 secret (redacted)
!
class-map match-any http-hacks
match protocol http url "*default.ida*"
match protocol http url "*cmd.exe*"
match protocol http url "*root.exe*"
match protocol http url "*readme.eml*"
!
policy-map drop-inbound-http-hacks
class http-hacks
police cir 1000000 bc 31250 be 31250
conform-action drop
exceed-action drop
violate-action drop
!
interface Null0
no ip unreachables
!
interface FastEthernet0/0
ip address (redacted) test of outside 1&2, not normally used
ip access-group 1 in
ip access-group 1 out
ip nat outside
ip virtual-reassembly
shutdown
duplex auto
speed auto
!
interface Ethernet2/0
description (redacted) Ambit Cable Modem/Router
ip address (redacted) outside1
ip access-group ms-rpc in
ip access-group ms-rpc out
no ip redirects
no ip unreachables
no ip proxy-arp
ip accounting access-violations
ip nat outside
ip ips ids-perimeter in
ip virtual-reassembly
no ip route-cache cef
no ip route-cache
no ip mroute-cache
half-duplex
no keepalive
no cdp enable
service-policy input drop-inbound-http-hacks
!
interface Ethernet2/1
ip address dhcp (not used)
shutdown
full-duplex
service-policy input drop-inbound-http-hacks
!
interface Ethernet2/2
ip address dhcp (not used)
shutdown
full-duplex
service-policy input drop-inbound-http-hacks
!
interface Ethernet2/3
description (redacted) Westell ADSL Modem
ip address (redacted) outside2
ip access-group ms-rpc in
ip access-group ms-rpc out
no ip redirects
no ip unreachables
no ip proxy-arp
ip accounting access-violations
ip nat outside
ip ips ids-perimeter in
ip virtual-reassembly
no ip route-cache cef
no ip route-cache
no ip mroute-cache
half-duplex
no keepalive
no cdp enable
service-policy input drop-inbound-http-hacks
!
interface FastEthernet3/0
!
interface FastEthernet3/1
!
interface FastEthernet3/2
!
interface FastEthernet3/3
!
interface FastEthernet3/4
!
interface FastEthernet3/5
!
interface FastEthernet3/6
!
interface FastEthernet3/7
!
interface FastEthernet3/8
!
interface FastEthernet3/9
!
interface FastEthernet3/10
!
interface FastEthernet3/11
!
interface FastEthernet3/12
!
interface FastEthernet3/13
!
interface FastEthernet3/14
!
interface FastEthernet3/15
!
interface Vlan1
ip address (redacted) inside1
ip access-group ms-rpc in
ip access-group ms-rpc out
no ip proxy-arp
ip accounting access-violations
ip nat inside
ip virtual-reassembly
!
no ip http server
no ip http secure-server
ip classless
ip route 0.0.0.0 0.0.0.0 (redacted) name (redacted) outside1
ip route 0.0.0.0 0.0.0.0 (redacted) name (redacted) outside2
!
no ip nat create flow-entries
ip nat pool (redacted) outside1 (redacted) (redacted) netmask
(redacted)
ip nat pool (redacted) outside2 (redacted) (redacted) netmask
(redacted)
ip nat inside source route-map (redacted) outside1 pool (redacted)
outside1 overload
ip nat inside source route-map (redacted) outside2 pool (redacted)
outside2 overload
!
!
ip access-list extended ms-rpc
deny tcp any any eq 135
deny udp any any eq 135
deny tcp any any eq 137
deny udp any any eq netbios-ns
deny tcp any any eq 138
deny udp any any eq netbios-dgm
deny tcp any any eq 139
deny udp any any eq netbios-ss
deny tcp any any eq 445
deny udp any any eq 445
deny tcp any any eq 593
deny udp any any eq 593
deny tcp any any eq 4444
deny udp any any eq 4444
deny tcp any any eq 4899
deny udp any any eq 4899
permit ip any any
ip access-list extended ssh
permit ip host (redacted) any log-input
permit ip host (redacted) any log-input
permit ip host (redacted) any log-input
permit ip host (redacted) any log-input
deny ip any any log-input
logging trap debugging
logging source-interface Vlan1
logging (redacted)
access-list 1 permit any
no cdp run
!
route-map (redacted) outside1 permit 10
match interface Ethernet2/0
!
route-map (redacted) outside2 permit 10
match interface Ethernet2/3
!
control-plane
!
dial-peer cor custom
!
gateway
timer receive-rtp 1200
!
line con 0
line aux 0
no exec
line vty 0 4
access-class ssh in
transport input ssh
transport output ssh
!
ntp authenticate
ntp clock-period 17180450
ntp max-associations 2
ntp server 164.67.62.194
ntp server 131.215.254.2
!
end


CISCO3640#sh ip int e2/0
Ethernet2/0 is up, line protocol is up
Internet address is (redacted) outside1
Broadcast address is 255.255.255.255
Address determined by non-volatile memory
MTU is 1500 bytes
Helper address is not set
Directed broadcast forwarding is disabled
Outgoing access list is ms-rpc
Inbound access list is ms-rpc
Proxy ARP is disabled
Local Proxy ARP is disabled
Security level is default
Split horizon is enabled
ICMP redirects are never sent
ICMP unreachables are never sent
ICMP mask replies are never sent
IP fast switching is disabled
IP fast switching on the same interface is disabled
IP Flow switching is disabled
IP CEF switching is disabled
IP Feature Fast switching turbo vector
IP multicast fast switching is disabled
IP multicast distributed fast switching is disabled
IP route-cache flags are No CEF
Router Discovery is disabled
IP output packet accounting is disabled
IP access violation accounting is enabled, system threshold is 512
TCP/IP header compression is disabled
RTP/IP header compression is disabled
Policy routing is disabled
Network address translation is enabled, interface in domain outside
BGP Policy Mapping is disabled
Inbound IPS rule is ids-perimeter
CISCO3640#sh int e2/0
Ethernet2/0 is up, line protocol is up
Hardware is AmdP2, address is 0008.a397.ace0 (bia 0008.a397.ace0)
Description: (redacted) outside1
Internet address is (redacted) outside1
MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive not set
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:01, output 00:00:01, output hang never
Last clearing of "show interface" counters 02:46:52
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops:
0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
32456 packets input, 37838100 bytes, 0 no buffer
Received 370 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 input packets with dribble condition detected
27244 packets output, 2121511 bytes, 0 underruns
0 output errors, 989 collisions, 1 interface resets
0 babbles, 0 late collision, 857 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
CISCO3640#sh ip int e2/3
Ethernet2/3 is up, line protocol is up
Internet address is (redacted) outside2
Broadcast address is 255.255.255.255
Address determined by non-volatile memory
MTU is 1500 bytes
Helper address is not set
Directed broadcast forwarding is disabled
Outgoing access list is ms-rpc
Inbound access list is ms-rpc
Proxy ARP is disabled
Local Proxy ARP is disabled
Security level is default
Split horizon is enabled
ICMP redirects are never sent
ICMP unreachables are never sent
ICMP mask replies are never sent
IP fast switching is disabled
IP fast switching on the same interface is disabled
IP Flow switching is disabled
IP CEF switching is disabled
IP Feature Fast switching turbo vector
IP multicast fast switching is disabled
IP multicast distributed fast switching is disabled
IP route-cache flags are No CEF
Router Discovery is disabled
IP output packet accounting is disabled
IP access violation accounting is enabled, system threshold is 512
TCP/IP header compression is disabled
RTP/IP header compression is disabled
Policy routing is disabled
Network address translation is enabled, interface in domain outside
BGP Policy Mapping is disabled
Inbound IPS rule is ids-perimeter
CISCO3640#sh int e2/3
Ethernet2/3 is up, line protocol is up
Hardware is AmdP2, address is 0008.a397.ace3 (bia 0008.a397.ace3)
Description: (redacted) outside2
Internet address is (redacted) outside2
MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive not set
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:07, output 00:00:07, output hang never
Last clearing of "show interface" counters 02:47:02
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops:
0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
16861 packets input, 18324718 bytes, 0 no buffer
Received 26 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 input packets with dribble condition detected
15685 packets output, 1742706 bytes, 0 underruns
0 output errors, 21 collisions, 4 interface resets
0 babbles, 0 late collision, 243 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
CISCO3640#sh ip int f0/0
FastEthernet0/0 is administratively down, line protocol is down
Internet address is (redacted) outside test stripped config
Broadcast address is 255.255.255.255
Address determined by setup command
MTU is 1500 bytes
Helper address is not set
Directed broadcast forwarding is disabled
Outgoing access list is 1
Inbound access list is 1
Proxy ARP is enabled
Local Proxy ARP is disabled
Security level is default
Split horizon is enabled
ICMP redirects are always sent
ICMP unreachables are always sent
ICMP mask replies are never sent
IP fast switching is enabled
IP fast switching on the same interface is disabled
IP Flow switching is disabled
IP CEF switching is enabled
IP CEF Feature Fast switching turbo vector
IP multicast fast switching is enabled
IP multicast distributed fast switching is disabled
IP route-cache flags are Fast, CEF
Router Discovery is disabled
IP output packet accounting is disabled
IP access violation accounting is disabled
TCP/IP header compression is disabled
RTP/IP header compression is disabled
Policy routing is disabled
Network address translation is enabled, interface in domain outside
BGP Policy Mapping is disabled
CISCO3640#sh int f0/0
FastEthernet0/0 is administratively down, line protocol is down
Hardware is AmdFE, address is 0008.a397.acc0 (bia 0008.a397.acc0)
Internet address is (redacted) outside test stripped config
MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Auto-duplex, Auto Speed, 100BaseTX/FX
ARP type: ARPA, ARP Timeout 04:00:00
Last input 2d23h, output 2d23h, output hang never
Last clearing of "show interface" counters 02:49:45
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops:
0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
0 packets input, 0 bytes
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog
0 input packets with dribble condition detected
0 packets output, 0 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out



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