Re: [Mikrotik Users] Queuing for half duplex

[Faisal Imtiaz via Mikrotik-users]

http://blog.butchevans.com/2008/10/using-ospf-to-create-full-duplex-behaviour-for-wireless-links/

Courtesy of Butch Evans.

Regards.

Faisal Imtiaz
Snappy Internet & Telecom
http://www.snappytelecom.net

Tel: 305 663 5518 x 232

Help-desk: (305)663-5518 Option 2 or Email: supp...@snappytelecom.net

- Original Message -
> From: "Roy via Mikrotik-users" 
> To: "Mikrotik Users" 
> Sent: Wednesday, November 1, 2017 1:22:56 PM
> Subject: [Mikrotik Users] Queuing for half duplex

> Anyone got a pointer to how to set up queuing on a Mikrotik for a
> half-duplex circuit like a wireless link?  I would like to add some QOS
> to a radio.
> ___
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Re: [Mikrotik Users] BGP Question

[Faisal Imtiaz via Mikrotik-users]

Technically yes...


Faisal Imtiaz
Snappy Internet & Telecom
http://www.snappytelecom.net

Tel: 305 663 5518 x 232

Help-desk: (305)663-5518 Option 2 or Email: supp...@snappytelecom.net

- Original Message -
> From: "Ethan E. Dee" 
> To: "Faisal Imtiaz" 
> Cc: "Mikrotik Users" 
> Sent: Wednesday, November 1, 2017 2:44:43 PM
> Subject: Re: [Mikrotik Users] BGP Question

> If I advertise a summarized subnet to C and more specific subnets to A
> and S, would C only failover in event of losing A or S?
> 
> 
> On 11/1/2017 10:45 AM, Faisal Imtiaz wrote:
>> Feel free to call me..
>>
>> 305 921 4141
>>
>>
>> Faisal Imtiaz
>> Snappy Internet & Telecom
>> http://www.snappytelecom.net
>>
>> Tel: 305 663 5518 x 232
>>
>> Help-desk: (305)663-5518 Option 2 or Email: supp...@snappytelecom.net
>>
>> - Original Message -
>>> From: "Ethan E. Dee" 
>>> To: "Faisal Imtiaz" 
>>> Cc: "Mikrotik Users" 
>>> Sent: Wednesday, November 1, 2017 10:31:41 AM
>>> Subject: Re: [Mikrotik Users] BGP Question
>>> I'm confused as to why I need iBGP in order to maintain traffic outside
>>> of my network. Is iBGP able to make changes to my eBGP peering sessions
>>> that would be helpful to my cause? Or are you just saying I should be
>>> running iBGP internally to make things less messy in general?
>>>
>>> It is possible it is going over my head. Would you be able call me and
>>> explain?
>>>
>>> On 11/1/2017 10:09 AM, Faisal Imtiaz wrote:
 See answers inline ..

 Faisal Imtiaz
 Snappy Internet & Telecom
 http://www.snappytelecom.net

 Tel: 305 663 5518 x 232

 Help-desk: (305)663-5518 Option 2 or Email: supp...@snappytelecom.net

 - Original Message -
> From: "Ethan E. Dee" 
> To: "Faisal Imtiaz" , "Mikrotik Users"
> 
> Sent: Wednesday, November 1, 2017 9:51:56 AM
> Subject: Re: [Mikrotik Users] BGP Question
> I am only referring to traffic leaving the internet and entering my 
> network.
 This is called inbound traffic... yes that is exactly what I was talking 
 about
 too.
> I do not want A's traffic to come in thru C unless it is absolutely
> dire. i.e. the BGP session on A quits or the router itself dies.
>
 I understand, what you desire to do.. however it may not match up to what 
 your
 Upstream Desires..
 (e.g. if you advertise A's prefix as 'normal' and C's prefix as 
 'backup'... A's
 network will see C as local connected and insist on using it over an 
 external
 route)



> I have tried setting BGP prepend to 16x on C.
 Like I said, that will not work for you...

> I have used At and Charter Communities to announce a different local
> pref (100 on At 70 on Charter.)
>
 Sort of right track, but you have to evaluate as to how they have their 
 network
 configured.
 Keep in mind Local Pref is only Local to that ASN.. you have to look at 
 their
 network traffic engineering to determine if you are making yourself more
 attractive or less attractive ... and use the local pref figures 
 comparative to
 their's i.e. local pref of 70 does not mean the same thing on all 
 networks
 ! (it is a relative parameter)

> No luck. Looking at the looking glass, Charter is largely the preferred
> path for HE. See attached.
 Welcome to solving a 3 dimensional equation... Charter may be Purchasing IP
 Transit from HE or peering with HE
 Which would explain this..

> Get a similar answer from Cogent's looking glass.
 Not sure if you are reading the 'details' as some of the LG's show.. or 
 just the
 'best path' along with ASN's
> I am using OSPF as my IGP btw. I can route the traffic out the correct
> router just fine. It is the returning traffic I have a problem with.
>
 This is not the proper way to do things...
 The recommended best practices are :-

 use OSPF for distributing loop back IP's
 use iBGP (a requirement) between all the routers (each router needs one 
 session
 to each of the others) for re-distributing your BGP routes

 If you want to run your network as three islands, I suppose you could do 
 it they
 way you are trying to..
 but you are going to have some interesting issues to deal with (especially 
 if
 there is an anomaly on one of the paths, and your asymmetric traffic will 
 show
 weird stuff).

> Do not be afraid to assume I have no idea what I am doing. I have
> followed every rule I can find online so obviously I'm doing something
> wrong.
>
>
>
> On 11/1/2017 9:45 AM, Faisal Imtiaz wrote:
>> I wish there was a 

Re: [Mikrotik Users] BGP Question

[Ethan E. Dee via Mikrotik-users]

If I advertise a summarized subnet to C and more specific subnets to A 
and S, would C only failover in event of losing A or S?


On 11/1/2017 10:45 AM, Faisal Imtiaz wrote:
> Feel free to call me..
>
> 305 921 4141
>
>
> Faisal Imtiaz
> Snappy Internet & Telecom
> http://www.snappytelecom.net
>
> Tel: 305 663 5518 x 232
>
> Help-desk: (305)663-5518 Option 2 or Email: supp...@snappytelecom.net
>
> - Original Message -
>> From: "Ethan E. Dee" 
>> To: "Faisal Imtiaz" 
>> Cc: "Mikrotik Users" 
>> Sent: Wednesday, November 1, 2017 10:31:41 AM
>> Subject: Re: [Mikrotik Users] BGP Question
>> I'm confused as to why I need iBGP in order to maintain traffic outside
>> of my network. Is iBGP able to make changes to my eBGP peering sessions
>> that would be helpful to my cause? Or are you just saying I should be
>> running iBGP internally to make things less messy in general?
>>
>> It is possible it is going over my head. Would you be able call me and
>> explain?
>>
>> On 11/1/2017 10:09 AM, Faisal Imtiaz wrote:
>>> See answers inline ..
>>>
>>> Faisal Imtiaz
>>> Snappy Internet & Telecom
>>> http://www.snappytelecom.net
>>>
>>> Tel: 305 663 5518 x 232
>>>
>>> Help-desk: (305)663-5518 Option 2 or Email: supp...@snappytelecom.net
>>>
>>> - Original Message -
 From: "Ethan E. Dee" 
 To: "Faisal Imtiaz" , "Mikrotik Users"
 
 Sent: Wednesday, November 1, 2017 9:51:56 AM
 Subject: Re: [Mikrotik Users] BGP Question
 I am only referring to traffic leaving the internet and entering my 
 network.
>>> This is called inbound traffic... yes that is exactly what I was talking 
>>> about
>>> too.
 I do not want A's traffic to come in thru C unless it is absolutely
 dire. i.e. the BGP session on A quits or the router itself dies.

>>> I understand, what you desire to do.. however it may not match up to what 
>>> your
>>> Upstream Desires..
>>> (e.g. if you advertise A's prefix as 'normal' and C's prefix as 'backup'... 
>>> A's
>>> network will see C as local connected and insist on using it over an 
>>> external
>>> route)
>>>
>>>
>>>
 I have tried setting BGP prepend to 16x on C.
>>> Like I said, that will not work for you...
>>>
 I have used At and Charter Communities to announce a different local
 pref (100 on At 70 on Charter.)

>>> Sort of right track, but you have to evaluate as to how they have their 
>>> network
>>> configured.
>>> Keep in mind Local Pref is only Local to that ASN.. you have to look at 
>>> their
>>> network traffic engineering to determine if you are making yourself more
>>> attractive or less attractive ... and use the local pref figures 
>>> comparative to
>>> their's i.e. local pref of 70 does not mean the same thing on all 
>>> networks
>>> ! (it is a relative parameter)
>>>
 No luck. Looking at the looking glass, Charter is largely the preferred
 path for HE. See attached.
>>> Welcome to solving a 3 dimensional equation... Charter may be Purchasing IP
>>> Transit from HE or peering with HE
>>> Which would explain this..
>>>
 Get a similar answer from Cogent's looking glass.
>>> Not sure if you are reading the 'details' as some of the LG's show.. or 
>>> just the
>>> 'best path' along with ASN's
 I am using OSPF as my IGP btw. I can route the traffic out the correct
 router just fine. It is the returning traffic I have a problem with.

>>> This is not the proper way to do things...
>>> The recommended best practices are :-
>>>
>>> use OSPF for distributing loop back IP's
>>> use iBGP (a requirement) between all the routers (each router needs one 
>>> session
>>> to each of the others) for re-distributing your BGP routes
>>>
>>> If you want to run your network as three islands, I suppose you could do it 
>>> they
>>> way you are trying to..
>>> but you are going to have some interesting issues to deal with (especially 
>>> if
>>> there is an anomaly on one of the paths, and your asymmetric traffic will 
>>> show
>>> weird stuff).
>>>
 Do not be afraid to assume I have no idea what I am doing. I have
 followed every rule I can find online so obviously I'm doing something
 wrong.



 On 11/1/2017 9:45 AM, Faisal Imtiaz wrote:
> I wish there was a simple answer to your question...
>
> But... there are some more questions
>
> With the setup you have described.
>   Are you running iBGP sessions between all the routers ?
>  if not.. then you are not properly configured.
>
> In today's day and age, one needs to do Traffic Engineering to have the 
> type of
> traffic flow one desires.
>   I wish there was a 'one solution' that fits all situations.. but 
> there isn't
>   one.
>   Each IP Transit provider is doing their own 'style' of Network 

Re: [Mikrotik Users] Queuing for half duplex

[Scott Reed via Mikrotik-users]

Yep.

I would suggest searching for the HTB queuing stuff. There are a couple 
of MUM session recordings and some examples available.



On 11/1/2017 1:52 PM, Josh Luthman via Mikrotik-users wrote:

Would queue tree with a parent of global maybe do something for that?


Josh Luthman
Office: 937-552-2340
Direct: 937-552-2343
1100 Wayne St
Suite 1337
Troy, OH 45373

On Wed, Nov 1, 2017 at 1:49 PM, Roy via Mikrotik-users 
> wrote:


I was looking for the ability to say something like a maximum of
10Mbps
total without regard to direction

On 11/1/2017 10:36 AM, Ethan E. Dee wrote:
> What are you looking at specifically? Sounds like you could set
up an
> asymetric simple queue.
>
> On 11/1/2017 1:22 PM, Roy via Mikrotik-users wrote:
>> Anyone got a pointer to how to set up queuing on a Mikrotik for a
>> half-duplex circuit like a wireless link?  I would like to add
some QOS
>> to a radio.
>>
>
>

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Re: [Mikrotik Users] Queuing for half duplex

[Roy via Mikrotik-users]

I was looking for the ability to say something like a maximum of 10Mbps 
total without regard to direction

On 11/1/2017 10:36 AM, Ethan E. Dee wrote:
> What are you looking at specifically? Sounds like you could set up an 
> asymetric simple queue.
>
> On 11/1/2017 1:22 PM, Roy via Mikrotik-users wrote:
>> Anyone got a pointer to how to set up queuing on a Mikrotik for a
>> half-duplex circuit like a wireless link?  I would like to add some QOS
>> to a radio.
>>
>
>

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Re: [Mikrotik Users] Queuing for half duplex

[Ethan E. Dee via Mikrotik-users]

What are you looking at specifically? Sounds like you could set up an 
asymetric simple queue.

On 11/1/2017 1:22 PM, Roy via Mikrotik-users wrote:
> Anyone got a pointer to how to set up queuing on a Mikrotik for a
> half-duplex circuit like a wireless link?  I would like to add some QOS
> to a radio.
> ___
> Mikrotik-users mailing list
> Mikrotik-users@wispa.org
> http://lists.wispa.org/mailman/listinfo/mikrotik-users

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[Mikrotik Users] Queuing for half duplex

[Roy via Mikrotik-users]

Anyone got a pointer to how to set up queuing on a Mikrotik for a 
half-duplex circuit like a wireless link?  I would like to add some QOS 
to a radio.
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Re: [Mikrotik Users] BGP Question

[Shawn C. Peppers via Mikrotik-users]

Also you will need to set the bgp prepend path appropriately for you inbound 
traffic desires.  I use this on multiple networks and it works fine. 

Shawn C. Peppers
Video Direct
866-680-8433 Toll Free
http://www.video-direct.tv

> On Nov 1, 2017, at 8:06 AM, Ethan E. Dee via Mikrotik-users 
>  wrote:
> 
> I am multihomed. I have a router that peers with charter and advertises 
> a few subnets. (Let's call it C)
> 
> I have a router that peers with AT at a tower (lets call it A)
> 
> And a router that peers with Spirit at a tower (lets call it S)
> 
> AT seems to have quite a low preference to the world. And I have no 
> idea what I'm doing. Though I feel like I do.
> 
> Nothing works.
> 
> All three routers are mikrotik. How do I tell the world to forget about 
> Charters advertisements unless you can no longer see AT?
> 
> 
> 
> 
> --
> This message has been scanned by E.F.A. Project and is believed to be clean.
> 
> 
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Re: [Mikrotik Users] BGP Question

[Shawn C. Peppers via Mikrotik-users]

Use bgp local preference to add ASN “weight” out the specific undesired primary 
upstream provider.  

Shawn C. Peppers
Video Direct
866-680-8433 Toll Free
http://www.video-direct.tv

> On Nov 1, 2017, at 8:06 AM, Ethan E. Dee via Mikrotik-users 
>  wrote:
> 
> I am multihomed. I have a router that peers with charter and advertises 
> a few subnets. (Let's call it C)
> 
> I have a router that peers with AT at a tower (lets call it A)
> 
> And a router that peers with Spirit at a tower (lets call it S)
> 
> AT seems to have quite a low preference to the world. And I have no 
> idea what I'm doing. Though I feel like I do.
> 
> Nothing works.
> 
> All three routers are mikrotik. How do I tell the world to forget about 
> Charters advertisements unless you can no longer see AT?
> 
> 
> 
> 
> --
> This message has been scanned by E.F.A. Project and is believed to be clean.
> 
> 
> ___
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Re: [Mikrotik Users] BGP Question

[Faisal Imtiaz via Mikrotik-users]

Feel free to call me..

305 921 4141


Faisal Imtiaz
Snappy Internet & Telecom
http://www.snappytelecom.net

Tel: 305 663 5518 x 232

Help-desk: (305)663-5518 Option 2 or Email: supp...@snappytelecom.net

- Original Message -
> From: "Ethan E. Dee" 
> To: "Faisal Imtiaz" 
> Cc: "Mikrotik Users" 
> Sent: Wednesday, November 1, 2017 10:31:41 AM
> Subject: Re: [Mikrotik Users] BGP Question

> I'm confused as to why I need iBGP in order to maintain traffic outside
> of my network. Is iBGP able to make changes to my eBGP peering sessions
> that would be helpful to my cause? Or are you just saying I should be
> running iBGP internally to make things less messy in general?
> 
> It is possible it is going over my head. Would you be able call me and
> explain?
> 
> On 11/1/2017 10:09 AM, Faisal Imtiaz wrote:
>> See answers inline ..
>>
>> Faisal Imtiaz
>> Snappy Internet & Telecom
>> http://www.snappytelecom.net
>>
>> Tel: 305 663 5518 x 232
>>
>> Help-desk: (305)663-5518 Option 2 or Email: supp...@snappytelecom.net
>>
>> - Original Message -
>>> From: "Ethan E. Dee" 
>>> To: "Faisal Imtiaz" , "Mikrotik Users"
>>> 
>>> Sent: Wednesday, November 1, 2017 9:51:56 AM
>>> Subject: Re: [Mikrotik Users] BGP Question
>>> I am only referring to traffic leaving the internet and entering my network.
>> This is called inbound traffic... yes that is exactly what I was talking 
>> about
>> too.
>>> I do not want A's traffic to come in thru C unless it is absolutely
>>> dire. i.e. the BGP session on A quits or the router itself dies.
>>>
>> I understand, what you desire to do.. however it may not match up to what 
>> your
>> Upstream Desires..
>> (e.g. if you advertise A's prefix as 'normal' and C's prefix as 'backup'... 
>> A's
>> network will see C as local connected and insist on using it over an external
>> route)
>>
>>
>>
>>> I have tried setting BGP prepend to 16x on C.
>> Like I said, that will not work for you...
>>
>>> I have used At and Charter Communities to announce a different local
>>> pref (100 on At 70 on Charter.)
>>>
>> Sort of right track, but you have to evaluate as to how they have their 
>> network
>> configured.
>> Keep in mind Local Pref is only Local to that ASN.. you have to look at their
>> network traffic engineering to determine if you are making yourself more
>> attractive or less attractive ... and use the local pref figures comparative 
>> to
>> their's i.e. local pref of 70 does not mean the same thing on all 
>> networks
>> ! (it is a relative parameter)
>>
>>> No luck. Looking at the looking glass, Charter is largely the preferred
>>> path for HE. See attached.
>> Welcome to solving a 3 dimensional equation... Charter may be Purchasing IP
>> Transit from HE or peering with HE
>> Which would explain this..
>>
>>> Get a similar answer from Cogent's looking glass.
>> Not sure if you are reading the 'details' as some of the LG's show.. or just 
>> the
>> 'best path' along with ASN's
>>> I am using OSPF as my IGP btw. I can route the traffic out the correct
>>> router just fine. It is the returning traffic I have a problem with.
>>>
>> This is not the proper way to do things...
>> The recommended best practices are :-
>>
>> use OSPF for distributing loop back IP's
>> use iBGP (a requirement) between all the routers (each router needs one 
>> session
>> to each of the others) for re-distributing your BGP routes
>>
>> If you want to run your network as three islands, I suppose you could do it 
>> they
>> way you are trying to..
>> but you are going to have some interesting issues to deal with (especially if
>> there is an anomaly on one of the paths, and your asymmetric traffic will 
>> show
>> weird stuff).
>>
>>> Do not be afraid to assume I have no idea what I am doing. I have
>>> followed every rule I can find online so obviously I'm doing something
>>> wrong.
>>>
>>>
>>>
>>> On 11/1/2017 9:45 AM, Faisal Imtiaz wrote:
 I wish there was a simple answer to your question...

 But... there are some more questions

 With the setup you have described.
  Are you running iBGP sessions between all the routers ?
 if not.. then you are not properly configured.

 In today's day and age, one needs to do Traffic Engineering to have the 
 type of
 traffic flow one desires.
  I wish there was a 'one solution' that fits all situations.. but 
 there isn't
  one.
  Each IP Transit provider is doing their own 'style' of Network Traffic
  Engineering
  One has to understand that first and then try to compensate for it.
 One should ask their upstream for a list of their BGP Communities, 
 that gives a
 good starting point.
 Using the upstream's Looking glass, if available is also a great 
 tool in

Re: [Mikrotik Users] BGP Question

[Ethan E. Dee via Mikrotik-users]

I'm confused as to why I need iBGP in order to maintain traffic outside 
of my network. Is iBGP able to make changes to my eBGP peering sessions 
that would be helpful to my cause? Or are you just saying I should be 
running iBGP internally to make things less messy in general?

It is possible it is going over my head. Would you be able call me and 
explain?

On 11/1/2017 10:09 AM, Faisal Imtiaz wrote:
> See answers inline ..
>
> Faisal Imtiaz
> Snappy Internet & Telecom
> http://www.snappytelecom.net
>
> Tel: 305 663 5518 x 232
>
> Help-desk: (305)663-5518 Option 2 or Email: supp...@snappytelecom.net
>
> - Original Message -
>> From: "Ethan E. Dee" 
>> To: "Faisal Imtiaz" , "Mikrotik Users" 
>> 
>> Sent: Wednesday, November 1, 2017 9:51:56 AM
>> Subject: Re: [Mikrotik Users] BGP Question
>> I am only referring to traffic leaving the internet and entering my network.
> This is called inbound traffic... yes that is exactly what I was talking 
> about too.
>> I do not want A's traffic to come in thru C unless it is absolutely
>> dire. i.e. the BGP session on A quits or the router itself dies.
>>
> I understand, what you desire to do.. however it may not match up to what 
> your Upstream Desires..
> (e.g. if you advertise A's prefix as 'normal' and C's prefix as 'backup'... 
> A's network will see C as local connected and insist on using it over an 
> external route)
>
>
>
>> I have tried setting BGP prepend to 16x on C.
> Like I said, that will not work for you...
>
>> I have used At and Charter Communities to announce a different local
>> pref (100 on At 70 on Charter.)
>>
> Sort of right track, but you have to evaluate as to how they have their 
> network configured.
> Keep in mind Local Pref is only Local to that ASN.. you have to look at their 
> network traffic engineering to determine if you are making yourself more 
> attractive or less attractive ... and use the local pref figures comparative 
> to their's i.e. local pref of 70 does not mean the same thing on all 
> networks ! (it is a relative parameter)
>
>> No luck. Looking at the looking glass, Charter is largely the preferred
>> path for HE. See attached.
> Welcome to solving a 3 dimensional equation... Charter may be Purchasing IP 
> Transit from HE or peering with HE
> Which would explain this..
>
>> Get a similar answer from Cogent's looking glass.
> Not sure if you are reading the 'details' as some of the LG's show.. or just 
> the 'best path' along with ASN's
>> I am using OSPF as my IGP btw. I can route the traffic out the correct
>> router just fine. It is the returning traffic I have a problem with.
>>
> This is not the proper way to do things...
> The recommended best practices are :-
>
> use OSPF for distributing loop back IP's
> use iBGP (a requirement) between all the routers (each router needs one 
> session to each of the others) for re-distributing your BGP routes
>
> If you want to run your network as three islands, I suppose you could do it 
> they way you are trying to..
> but you are going to have some interesting issues to deal with (especially if 
> there is an anomaly on one of the paths, and your asymmetric traffic will 
> show weird stuff).
>
>> Do not be afraid to assume I have no idea what I am doing. I have
>> followed every rule I can find online so obviously I'm doing something
>> wrong.
>>
>>
>>
>> On 11/1/2017 9:45 AM, Faisal Imtiaz wrote:
>>> I wish there was a simple answer to your question...
>>>
>>> But... there are some more questions
>>>
>>> With the setup you have described.
>>>  Are you running iBGP sessions between all the routers ?
>>> if not.. then you are not properly configured.
>>>
>>> In today's day and age, one needs to do Traffic Engineering to have the 
>>> type of
>>> traffic flow one desires.
>>>  I wish there was a 'one solution' that fits all situations.. but there 
>>> isn't
>>>  one.
>>>  Each IP Transit provider is doing their own 'style' of Network Traffic
>>>  Engineering
>>>  One has to understand that first and then try to compensate for it.
>>> One should ask their upstream for a list of their BGP Communities, 
>>> that gives a
>>> good starting point.
>>> Using the upstream's Looking glass, if available is also a great 
>>> tool in
>>> verifying the traffic engineering
>>>
>>> simply passing ASN's does not work (most of the time, but varies with 
>>> upstream)
>>>
>>> BGP Traffic engineering is more like steering a Boat Rudder than steering a
>>> car... :)
>>>
>>> If what is listed above makes sense to you, then you have some starting 
>>> points
>>> to read up and understand BGP
>>> If the above does not.. then I suggest you get someone to help you with the
>>> setup.
>>>
>>> Regards.
>>>
>>> Faisal Imtiaz
>>> Snappy Internet & Telecom
>>> http://www.snappytelecom.net
>>>
>>> Tel: 305 663 5518 x 232
>>>
>>> Help-desk: 

Re: [Mikrotik Users] BGP Question

[Faisal Imtiaz via Mikrotik-users]

See answers inline ..

Faisal Imtiaz
Snappy Internet & Telecom
http://www.snappytelecom.net

Tel: 305 663 5518 x 232

Help-desk: (305)663-5518 Option 2 or Email: supp...@snappytelecom.net

- Original Message -
> From: "Ethan E. Dee" 
> To: "Faisal Imtiaz" , "Mikrotik Users" 
> 
> Sent: Wednesday, November 1, 2017 9:51:56 AM
> Subject: Re: [Mikrotik Users] BGP Question

> I am only referring to traffic leaving the internet and entering my network.

This is called inbound traffic... yes that is exactly what I was talking about 
too.
> 
> I do not want A's traffic to come in thru C unless it is absolutely
> dire. i.e. the BGP session on A quits or the router itself dies.
> 

I understand, what you desire to do.. however it may not match up to what your 
Upstream Desires..
(e.g. if you advertise A's prefix as 'normal' and C's prefix as 'backup'... A's 
network will see C as local connected and insist on using it over an external 
route)



> I have tried setting BGP prepend to 16x on C.

Like I said, that will not work for you...

> 
> I have used At and Charter Communities to announce a different local
> pref (100 on At 70 on Charter.)
> 

Sort of right track, but you have to evaluate as to how they have their network 
configured.
Keep in mind Local Pref is only Local to that ASN.. you have to look at their 
network traffic engineering to determine if you are making yourself more 
attractive or less attractive ... and use the local pref figures comparative to 
their's i.e. local pref of 70 does not mean the same thing on all networks 
! (it is a relative parameter)

> No luck. Looking at the looking glass, Charter is largely the preferred
> path for HE. See attached.

Welcome to solving a 3 dimensional equation... Charter may be Purchasing IP 
Transit from HE or peering with HE 
Which would explain this..

> 
> Get a similar answer from Cogent's looking glass.

Not sure if you are reading the 'details' as some of the LG's show.. or just 
the 'best path' along with ASN's
> 
> I am using OSPF as my IGP btw. I can route the traffic out the correct
> router just fine. It is the returning traffic I have a problem with.
> 

This is not the proper way to do things...
The recommended best practices are :-

use OSPF for distributing loop back IP's
use iBGP (a requirement) between all the routers (each router needs one session 
to each of the others) for re-distributing your BGP routes

If you want to run your network as three islands, I suppose you could do it 
they way you are trying to..
but you are going to have some interesting issues to deal with (especially if 
there is an anomaly on one of the paths, and your asymmetric traffic will show 
weird stuff).  

> Do not be afraid to assume I have no idea what I am doing. I have
> followed every rule I can find online so obviously I'm doing something
> wrong.
> 
> 
> 
> On 11/1/2017 9:45 AM, Faisal Imtiaz wrote:
>> I wish there was a simple answer to your question...
>>
>> But... there are some more questions
>>
>> With the setup you have described.
>> Are you running iBGP sessions between all the routers ?
>>if not.. then you are not properly configured.
>>
>> In today's day and age, one needs to do Traffic Engineering to have the type 
>> of
>> traffic flow one desires.
>> I wish there was a 'one solution' that fits all situations.. but there 
>> isn't
>> one.
>> Each IP Transit provider is doing their own 'style' of Network Traffic
>> Engineering
>> One has to understand that first and then try to compensate for it.
>>One should ask their upstream for a list of their BGP Communities, 
>> that gives a
>>good starting point.
>>Using the upstream's Looking glass, if available is also a great tool 
>> in
>>verifying the traffic engineering
>>
>> simply passing ASN's does not work (most of the time, but varies with 
>> upstream)
>>
>> BGP Traffic engineering is more like steering a Boat Rudder than steering a
>> car... :)
>>
>> If what is listed above makes sense to you, then you have some starting 
>> points
>> to read up and understand BGP
>> If the above does not.. then I suggest you get someone to help you with the
>> setup.
>>
>> Regards.
>>
>> Faisal Imtiaz
>> Snappy Internet & Telecom
>> http://www.snappytelecom.net
>>
>> Tel: 305 663 5518 x 232
>>
>> Help-desk: (305)663-5518 Option 2 or Email: supp...@snappytelecom.net
>>
>> - Original Message -
>>> From: "Ethan E. Dee via Mikrotik-users" 
>>> To: "Mark Grigsby via Mikrotik-users" 
>>> Sent: Wednesday, November 1, 2017 9:06:27 AM
>>> Subject: [Mikrotik Users] BGP Question
>>> I am multihomed. I have a router that peers with charter and advertises
>>> a few subnets. (Let's call it C)
>>>
>>> I have a router that peers with AT at a tower (lets call it A)
>>>
>>> And a router that peers with 

Re: [Mikrotik Users] BGP Question

[Faisal Imtiaz via Mikrotik-users]

I wish there was a simple answer to your question...

But... there are some more questions

With the setup you have described.
   Are you running iBGP sessions between all the routers ? 
  if not.. then you are not properly configured.

In today's day and age, one needs to do Traffic Engineering to have the type of 
traffic flow one desires.
   I wish there was a 'one solution' that fits all situations.. but there isn't 
one.
   Each IP Transit provider is doing their own 'style' of Network Traffic 
Engineering
   One has to understand that first and then try to compensate for it.
  One should ask their upstream for a list of their BGP Communities, that 
gives a good starting point.
  Using the upstream's Looking glass, if available is also a great tool in 
verifying the traffic engineering

simply passing ASN's does not work (most of the time, but varies with upstream)

BGP Traffic engineering is more like steering a Boat Rudder than steering a 
car... :)

If what is listed above makes sense to you, then you have some starting points 
to read up and understand BGP
If the above does not.. then I suggest you get someone to help you with the 
setup.

Regards.

Faisal Imtiaz
Snappy Internet & Telecom
http://www.snappytelecom.net

Tel: 305 663 5518 x 232

Help-desk: (305)663-5518 Option 2 or Email: supp...@snappytelecom.net

- Original Message -
> From: "Ethan E. Dee via Mikrotik-users" 
> To: "Mark Grigsby via Mikrotik-users" 
> Sent: Wednesday, November 1, 2017 9:06:27 AM
> Subject: [Mikrotik Users] BGP Question

> I am multihomed. I have a router that peers with charter and advertises
> a few subnets. (Let's call it C)
> 
> I have a router that peers with AT at a tower (lets call it A)
> 
> And a router that peers with Spirit at a tower (lets call it S)
> 
> AT seems to have quite a low preference to the world. And I have no
> idea what I'm doing. Though I feel like I do.
> 
> Nothing works.
> 
> All three routers are mikrotik. How do I tell the world to forget about
> Charters advertisements unless you can no longer see AT?
> 
> 
> 
> 
> --
> This message has been scanned by E.F.A. Project and is believed to be clean.
> 
> 
> ___
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Re: [Mikrotik Users] BGP Question

[Mike Francis via Mikrotik-users]

Pad your AS to Charter.

By saying "nothing works" what does that mean? Are all your routers fully 
meshed? Are you advertising to your igp the necessary next hops?

Regards,
--
John Michael Francis II
JMF Solutions, Inc
Wavefly - Internet Voip Cloud
INC 5000 #2593
CRN Fast Growth #105
251-517-5069
http://jmfsolutions.net
http://wavefly.com

On November 1, 2017 8:06:27 AM CDT, "Ethan E. Dee via Mikrotik-users" 
 wrote:
>I am multihomed. I have a router that peers with charter and advertises
>
>a few subnets. (Let's call it C)
>
>I have a router that peers with AT at a tower (lets call it A)
>
>And a router that peers with Spirit at a tower (lets call it S)
>
>AT seems to have quite a low preference to the world. And I have no 
>idea what I'm doing. Though I feel like I do.
>
>Nothing works.
>
>All three routers are mikrotik. How do I tell the world to forget about
>
>Charters advertisements unless you can no longer see AT?
>
>
>
>
>--
>This message has been scanned by E.F.A. Project and is believed to be
>clean.
>
>
>___
>Mikrotik-users mailing list
>Mikrotik-users@wispa.org
>http://lists.wispa.org/mailman/listinfo/mikrotik-users
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[Mikrotik Users] BGP Question

[Ethan E. Dee via Mikrotik-users]

I am multihomed. I have a router that peers with charter and advertises 
a few subnets. (Let's call it C)

I have a router that peers with AT at a tower (lets call it A)

And a router that peers with Spirit at a tower (lets call it S)

AT seems to have quite a low preference to the world. And I have no 
idea what I'm doing. Though I feel like I do.

Nothing works.

All three routers are mikrotik. How do I tell the world to forget about 
Charters advertisements unless you can no longer see AT?




--
This message has been scanned by E.F.A. Project and is believed to be clean.


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