Slow sync with cisco 877w

Soldato
Joined
12 Jan 2006
Posts
5,610
Location
UK
Anyone else not getting their full sync speed using this router?

I just up-graded the router modem software and erased the config and put the most basic config on that works and it wont go over 1.8mb (speedtest at 1.5)

If i take a spare router i have in the house (zyxel) i sync at 3mb and get around 2.5mb


version 12.4
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname Router
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
ip cef
!
!
no ip dhcp use vrf connected
ip dhcp excluded-address 192.168.0.1 192.168.0.5
!
ip dhcp pool insideDHCP
network 192.168.0.0 255.255.255.0
default-router 192.168.0.1
dns-server 212.139.132.5
!
!
!
multilink bundle-name authenticated
!
!
!
!
!
!
!
!
!
!
interface ATM0
no ip address
no ip redirects
no ip unreachables
no ip proxy-arp
no ip mroute-cache
no atm ilmi-keepalive
pvc 0/38
encapsulation aal5mux ppp dialer
dialer pool-member 1
!
dsl operating-mode auto
!
interface FastEthernet0
!
interface FastEthernet1
!
interface FastEthernet2
!
interface FastEthernet3
!
interface Dot11Radio0
no ip address
shutdown
speed basic-1.0 basic-2.0 basic-5.5 6.0 9.0 basic-11.0 12.0 18.0 24.0 36.0 48.0 54.0
station-role root
!
interface Vlan1
ip address 192.168.0.1 255.255.255.0
ip nat inside
ip virtual-reassembly
!
interface Dialer0
ip address negotiated
no ip redirects
no ip unreachables
no ip proxy-arp
ip nat outside
ip virtual-reassembly
encapsulation ppp
dialer pool 1
dialer idle-timeout 0
no cdp enable
ppp chap hostname
ppp chap password 0
ppp pap sent-username
ppp ipcp dns request accept
ppp ipcp route default
ppp ipcp address accept
!
ip route 0.0.0.0 0.0.0.0 Dialer0
!
!
no ip http server
no ip http secure-server
ip nat inside source list 1 interface Dialer0 overload
!
access-list 1 permit 192.168.0.0 0.0.0.255
!
!
!
!
control-plane
!
!
line con 0
logging synchronous
no modem enable
line aux 0
line vty 0 4
login
!
scheduler max-task-time 5000
end




sh dsl int stats

ATM0
Alcatel 20190 chipset information
ATU-R (DS) ATU-C (US)
Modem Status: Showtime (DMTDSL_SHOWTIME)
DSL Mode: ITU G.992.1 (G.DMT) Annex A
ITU STD NUM: 0x03 0x2
Vendor ID: 'STMI' 'TSTC'
Vendor Specific: 0x0000 0x0000
Vendor Country: 0x0F 0xB5
Chip ID: C196 (0)
DFE BOM: DFE3.0 Annex A (1)
Capacity Used: 95% 94%
Noise Margin: 4.5 dB 8.0 dB
Output Power: 16.5 dBm 12.5 dBm
Attenuation: 58.0 dB 30.5 dB
Defect Status: None None
Last Fail Code: None
Watchdog Counter: 0xAF
Watchdog Resets: 0
Selftest Result: 0x00
Subfunction: 0x00
Interrupts: 8294 (0 spurious)
PHY Access Err: 0
Activations: 1
LED Status: ON
LED On Time: 100
LED Off Time: 100
Init FW: init_AMR_4.0.017.bin
Operation FW: AMR-E-4.0.017.bin
FW Source: external
FW Version: 4.0.17

Interleave Fast Interleave Fast
Speed (kbps): 1856 0 832 0
Cells: 135381 0 818327 0
Reed-Solomon EC: 46 0 0 0
CRC Errors: 0 0 1 0
Header Errors: 0 0 0 0
Total BER: 0E-0 0E-0
Leakage Average BER: 0E-0 0E-0
ATU-R (DS) ATU-C (US)
Bitswap: enabled enabled
Bitswap success: 0 0
Bitswap failure: 0 0

LOM Monitoring : Disabled
 
My 877 syncs a good few mbit under what my much cheaper Netgear does. In my case its to do with the modem chipset used (the Netgear being Broadcom based and the Cisco Alcatel).... you will probably find its the same issue.

Have you tried a different modem firmware? I found the latest one actually synced a bit slower than 4.0.15.
 
Unfortunately, ZyXEL is awesome at DSL stuff and 877s are... not.

Actually, can you ping www.jolt.co.uk whilst you're at it and paste results? :D

(from behind the 877 and then the 660 would be awesome)
 
Last edited:
From my 877 anyway....

Sending 50, 100-byte ICMP Echos to 84.234.17.86, timeout is 2 seconds:
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Success rate is 100 percent (50/50), round-trip min/avg/max = 12/16/32 ms
 
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