[ixpmanager] IXPManager: Two customers on one port

[Barry O'Donovan (INEX)]

Hi Roland,

Yes, this is the perfect place for such questions!

As Chris says, you can use subinterfaces, which are supported by IXP 
Manager, at least certainly the type that creates what appears via snmp 
as a standard interface, like Arista’s implementation.  Sample config 
below, but it needs a specific tcam profile, which you’d be best to get 
from your Arista support team, as any other config/services you have 
defined would need to be considered.

The other, less technical way, is to use fanout ports. This means you 
burn a port for the uplink and then two ports for each member delivered 
via that uplink. See the docs for this at 
https://docs.ixpmanager.org/latest/features/reseller/.

  - Barry

Sample Arista Config

vlan 10
    name peeringlan

interface Ethernet25
    description Reseller: Acme Ltd
    load-interval 30
    no switchport
    no lldp transmit
    no lldp receive
    no sflow enable

interface Ethernet25.2001
    description Cust: Resold Customer 1 Ltd
    load-interval 30
    encapsulation dot1q vlan 2001
    vlan id 10
    mac access-group l2acl-ixp-resold-cust in
    service-policy type qos input pm-subinterface-1g
    shape rate 1000000

interface Ethernet25.2002
    description Cust: Resold Customer 2 Ltd
    load-interval 30
    encapsulation dot1q vlan 2002
    vlan id 10
    ...


On 21/04/2026 14:37:23, "Christopher Rössler via ixpmanager" 
<ixpmanager at inex.ie> wrote:

>Hi,
>Have you thought about using a reseller uplink interface for the "other 
>IXP" and putting the actual customers into resold subinterfaces?
>
>Kind regards,
>
>chris
>
>On Tue, Apr 21, 2026 at 3:04 PM Roland Christanell | Telmekom via 
>ixpmanager <ixpmanager at inex.ie> wrote:
>>Hello,
>>
>>
>>
>>I hope this is the right place to ask this question.
>>
>>I am using IXP Manager v7.1.0 and have 2 customers that are connected 
>>on one port, the reason is that this is some kind for “transport” from 
>>another IXP and therefore multiple customers can be connected on one 
>>port.
>>
>>Currently only one member has the actual port assigned and this leads 
>>to the problem, that for the second one I have traffic graph and the 
>>traffic off both is seen on the graph of the first member.
>>
>>
>>
>>Best regards,
>>
>>
>>
>>Roland Christanell
>>Network Engineer
>>
>>Rechteck.png
>>
>>
>>
>>_______________________________________________
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>>ixpmanager at inex.ie
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>
>
>--
>Christopher Rössler, Network Engineer
>christopher.roessler at bcix.de
>+49 30 2332195 37
>
>BCIX Management GmbH
>Albrechtstr. 110
>12103 Berlin
>Germany
>
>Geschäftsführer/Managing Directors: Jens Lietzmann, André Grüneberg
>Handelsregister: Amtsgericht Charlottenburg, HRB 143581 B


Kind regards,
Barry O'Donovan
INEX Operations

https://www.inex.ie/support/
+353 1 531 3339

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