ADSL Bonding

neil_g

neil_g

neil_g

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Joined
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right i think we might be getting fobbed off by our ISP..

if you took 4x 8mb adsl lines and bonded them in theory (depending on exchange location yadda yadda) you should be able to get a 32mb download speed yes?

however we're only seeing about 4mb through http://sod.ms/fast

our isp is saying that we would never see a true 32mb however the speed of concurrent connections will improve.

any reference websites would also be appriciated.

cheers
neil
 
neil_g said:
if you took 4x 8mb adsl lines and bonded them in theory (depending on exchange location yadda yadda) you should be able to get a 32mb download speed yes?
Click to expand...

in theory, yes, but ISP have to support bonding ADSL or it wont work.

i think ADSL24 ISP do bond up to 4 lines but arent cheap :(

i heard Bethere is planning to roll out new bond package in the future :D

so u only get 4mb download speed, so 4 x 4mb = 16megs, that's even slower than my single ADSL2+ line (19mb from bethere) :p
 
A number of factors must be taken into.

How are the connections setup at both ends ISP and end user etc.
What equipment are you using to bond the lines?

Will look for an answer and get back asap.

Regards.
 
Bonded Broadband uses standard Multilink PPP technology to bond multiple Broadband connections into a single, faster link. For example, two 2Mb/s lines can be bonded to form a link offering download speeds of up to 4Mb/s and upload speeds of up to 512Kb/s. Similarly, four 2Mb/s lines can be bonded to provide download speeds of up to 8Mb/s and upload speeds of up to 1Mb/s. And if you have enough lines available, eight 2Mb/s lines can be bonded to form a link with download speeds of up to 16Mb/s and upload speeds of up to 2Mb/s. Please note, however, that as with all Broadband speeds these figures are maximum theoretical speeds. In addition, a small amount of bandwidth overhead is used by the Multilink PPP protocol.

Note that Bonding is not the same as Load Balancing. With Load Balancing, each Broadband line used in the link is treated as a separate entity, meaning that the maximum speed any individual user can download any individual file is no more than the maximum speed any individual line can provide (e.g. 2Mb/s download and 256Kb/s upload). With Bonded Broadband, however, each individual line is effectively merged to form a single link running at a speed that is the sum of the speeds of the individual lines.
 
the lines are BT adsl max and we are using a cisco 2811 with 4 wic's.

how the lines are set up at the exchange i dont know, although i vagely remember a conversation with the telecoms provider and the words "fast interleaved" being mentioned it that helps?
 
You wouldnt get 32mb download but certainly more than 4 if they are bonded correctly.

Try and download from some where else as non speed testers show my true 2400k download speed. i only get that from newsgroups servers
 
It does not matter how the lines are setup at the exchange, your ISP must bond there end as well.

As your ISP if they are bonded at there end or just normal adsl connections.
 
Realist said:
Bonded Broadband uses standard Multilink PPP technology to bond multiple Broadband connections into a single, faster link. For example, two 2Mb/s lines can be bonded to form a link offering download speeds of up to 4Mb/s and upload speeds of up to 512Kb/s. Similarly, four 2Mb/s lines can be bonded to provide download speeds of up to 8Mb/s and upload speeds of up to 1Mb/s. And if you have enough lines available, eight 2Mb/s lines can be bonded to form a link with download speeds of up to 16Mb/s and upload speeds of up to 2Mb/s. Please note, however, that as with all Broadband speeds these figures are maximum theoretical speeds. In addition, a small amount of bandwidth overhead is used by the Multilink PPP protocol.

Note that Bonding is not the same as Load Balancing. With Load Balancing, each Broadband line used in the link is treated as a separate entity, meaning that the maximum speed any individual user can download any individual file is no more than the maximum speed any individual line can provide (e.g. 2Mb/s download and 256Kb/s upload). With Bonded Broadband, however, each individual line is effectively merged to form a single link running at a speed that is the sum of the speeds of the individual lines.
Click to expand...

Thats nice without a source, depends on the ISP, a lot of ISPs don't bother offering true bonding because it's a headache.

There is little advantage of bonding over load balancing in real life (assuming you're not talking about 1 person downloading huge files - but I don't care about them)
 
Slightly off topic here but am I correct in thinking that BT don't officially support ISPs offering MPPP bonded lines?
 
wij said:
Slightly off topic here but am I correct in thinking that BT don't officially support ISPs offering MPPP bonded lines?
Click to expand...

We don't offer it as it'd require more work than I can be bothered doing on our BT centrals (and as I said, load balancing is pretty much as good.) My understanding of support is that BT will not support the multi-linked line and consider each component connection to be a separate line. Could be wrong...
 
BTw don't support it and have broken it ("accidentally") in the past.

If the total bonded connection was fast enough (and it doesn't have to be that fast), you might find that you're contending with yourself for VP bandwidth.
 
the most weve had out of it was 600k down and that was with a download manager.

speaking to my manager here we have spoken to BT about this before and they have said officially the lines are 4 separate entities and will always be treated as such..

however we should still get some bonding of bandwidth through the cisco shouldnt we?
 
if bonded you would get a higher speed. are the lines actually running at 8mb/s (distance from exhcnage etc means its highly unlikely)

also due to the way that they are cabled to your house, the 3rd and 4th line will have slightly more noise so it would prolly be

line 1 -6mb/s
line2 - 6mb/s
line 3- 5.5mb/s
line 4 - 5-5.5mb/s

it seems that if your getting 4 you would be using one link that is connected at 4. and the other 3 are sitting not in use. its likely that the speed of each link is 4mb/s. whats your distance from the exchange.

you will need to configure the router to use all 4 links, i think your just using 1 atm
 
in that case can anyone see an issue with the config:

Code: 
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
!
hostname (removed)
!
boot-start-marker
boot-end-marker
!
enable secret (removed)
!
no aaa new-model
!
resource policy
!
ip subnet-zero
!
!
ip cef
!
!
voice-card 0
 no dspfarm
!
username (removed) privilege 15 password (removed)
!
!
!
!
interface FastEthernet0/0
 ip address (removed)
 duplex auto
 speed auto
!
interface FastEthernet0/1
 ip address (removed)
 duplex auto
 speed auto
!
interface ATM0/0/0
 no ip address
 no atm ilmi-keepalive
 dsl operating-mode auto 
 pvc 0/38 
 encapsulation aal5mux ppp dialer
  dialer pool-member 1
 !
!
interface ATM0/1/0
 no ip address
 no atm ilmi-keepalive
 dsl operating-mode auto 
 pvc 0/38 
  encapsulation aal5mux ppp dialer
  dialer pool-member 1
 !
!
interface ATM0/2/0
 no ip address
 no atm ilmi-keepalive
 dsl operating-mode auto 
 pvc 0/38 
  encapsulation aal5mux ppp dialer
  dialer pool-member 1
 !
!
interface ATM0/3/0
 no ip address
 no atm ilmi-keepalive
 dsl operating-mode auto 
 pvc 0/38 
  encapsulation aal5mux ppp dialer
  dialer pool-member 1
 !
!
interface Dialer0
 ip address negotiated
 ip accounting output-packets
 encapsulation ppp
 dialer pool 1
 dialer idle-timeout 0
 dialer persistent
 dialer-group 1
 ppp authentication chap callin
 ppp chap hostname (removed)
 ppp chap password (removed)
 ppp multilink
 ppp multilink fragment disable
!
ip classless
 ip route 0.0.0.0 0.0.0.0 Dialer0
!
!
ip http server
ip http authentication local
ip http secure-server
!
access-list 1 permit (removed)
access-list 1 permit (removed)
access-list 100 remark Remote Admin Access
access-list 100 permit ip (removed) any
dialer-list 1 protocol ip permit
snmp-server community public RO
!
!
!
control-plane
!
!
!
!
!
!
!
!
line con 0
line aux 0
line vty 0 4
 access-class 100 in
 privilege level 15
 password (removed)
 login local
 transport input telnet ssh
!
scheduler allocate 20000 1000
!
end
 
BT is the ISP (see above). however the engineer we spoke to seemed to think we still should be able to achieve this?
 
well, i think for a proper bonded set-up like your after you need to get the isp to bond there ends, otherwise you would need to set the router to forward traffic over the different ports etc. id spend a couple of hours reading up on multilink ppp etc...

this is http://www.managedcomms.co.uk/ a company that offer bonded links.
 
this is the problem, we're getting conflicting information. for example that managed comms page talks about bonded adsl max. we're using adsl max but thats BT and they supposedly dont support bonding.

i have a headache lol
 
lol, yeah you'd need to go with an isp that supports bonding. alternativly go with a llu 24mbits service, bethere for example.

you could load balance your connections but it would (again i think) only balance per ip, so it would send all requests to google down one line and all requests to xbox.com down the etc. nildram etc all support bonding.
 
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