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WannabeMKII
Aspiring Contributor
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Message 11 of 19

Re: Infinity on Cisco Router

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Hi all,

 

I've just tried to set up my Cisco 877w with infinity using these settings and I can't get it to work :-(

 

Has anyone successfully managed to setup infinity on an 877w?

 

Thanks,

 

Chris.

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WannabeMKII
Aspiring Contributor
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Message 12 of 19

Re: Infinity on Cisco Router

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Anyone? Smiley Sad

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bingul
Newbie
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Message 13 of 19

Re: Infinity on Cisco Router

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I am new in BT Infinity. 

My client is strugling for internet using BT's modem and Router.

 

My Intension is to replace BT's modem and Router by CISCO equipments.

 

Could you please let me know, which CISCO Router did you use for that setup.

Could you please let us know the Network Scenario for your setup.

 

Many thanks.

 

Help appreciated.

 

 

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Guru
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Message 14 of 19

Re: Infinity on Cisco Router

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The BT modem isn't bad (apart from being locked). Unless you actually have a fault on the modem, if you are having difficulty getting a proper connection with it, you are unlikely to do better with another device .

The HomeHub has various failings which can be overcome using alternative equipment. But again unless you have a duff one and the connection is bad, you probably won't get significantly better with an alternative.
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bingul
Newbie
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Message 15 of 19

Re: Infinity on Cisco Router

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Every Time We call to BT regarding the Infinity Internet problem in our office, only one solution they can offer........Just replace the Router.....they already replaced 6 routers in my office in last 6 months.....so is there any point of relying BT's Router or Modem.

 

I don't know is it really bad or not...

But I can say...BT's Router is not good really.

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Distinguished Expert
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Message 16 of 19

Re: Infinity on Cisco Router

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this is the residential infinity forum
for business you should post over there http://business.forums.bt.com/t5/Broadband-and-internet/bd-p/Broadband
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vimal003
Newbie
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Message 17 of 19

Re: Infinity on Cisco Router

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Hi LeeP,

 

I've got Cisco 1712 Router and i could set up the MTU on the wan interface but on the LAN side I've a switch module which does not suppot IP tcp adjust-mss. Is there a work around? Currently, I'm able to get on to the internet but i can browse some sites like gmail etc but can't ge tmany yahoo mail etc.

 

What would be your suggestion? What router did you use?

 

Thanks

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ADB
Aspiring Contributor
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Message 18 of 19

Re: Infinity on Cisco Router

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Hopefully this will help people with MTU issues.  I had Infinity installed a couple of months ago and immediately had issues with the MTU on my 887VA router.  It was easy to resolve after some searching and I had to add the following lines to the Dialer interface:

 

ip mtu 1492

ip tcp adjust-mss 1452

 

This worked but it annoyed me a bit as I had also read that BT support RFC 4638 (Mini Jumbo frames) on Infinity.  Anyway after some more searching I discovered this page - http://wiki.aa.org.uk/FTTC_Modem which lead me to start playing around with my 887VA again and today I seem to have resolved the MTU issue and can run the full 1500...

 

Change the parent Ethernet0 interface's MTU to 1508:

 

interface Ethernet0

 mru 1508

 

Change the PPPoE client to negotiate an MRU of 1500:

 

interface Ethernet0.101
 encapsulation dot1Q 101
 ip virtual-reassembly in
 pppoe enable group global
 pppoe-client dial-pool-number 1
 pppoe-client ppp-max-payload 1500

 

And then remove the 'ip mtu' and 'ip tcp adjust-mss' lines from the dialer interface.

 

And now I can ping at the maximum 1472 bytes..

 

C:\Users\computer>ping -4 www.google.com -l 1472 -f

Pinging www.google.com [31.55.163.155] with 1472 bytes of data:
Reply from 31.55.163.155: bytes=1472 time=22ms TTL=56
Reply from 31.55.163.155: bytes=1472 time=22ms TTL=56
Reply from 31.55.163.155: bytes=1472 time=22ms TTL=56
Reply from 31.55.163.155: bytes=1472 time=27ms TTL=56

Ping statistics for 31.55.163.155:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 22ms, Maximum = 27ms, Average = 23ms

 

Hope this helps anyone else with Cisco VDSL kit on Infinity.

 

Cheers

Andy

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ADB
Aspiring Contributor
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Message 19 of 19

Re: Infinity on Cisco Router

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Sorry that should have read:

interface Ethernet0
mtu 1508
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