[j-nsp] MC-lag and rstp

[Tomasz Mikołajek]

Hello.

Interface, mc-lag and iccp configuration. STP on Cisco switch (SW1) is
blocking vlan 113 on Po1 interface. What i want to achieve: irb.113 L3
interface only on MX2. When connection between MX2 and SW1 will be
interrupted, traffic will be forwarded from SW1 to MX1 and then to MX2. Is
it possible?


Configuration and topology:
http://pastebin.com/0CG3Bvae

2016-01-26 18:16 GMT+01:00 Alberto Santos <albertofsantos at gmail.com>:

> it is not clear what you want to achieve here, can you provide more
> information, topology and config :)????, As you pointed out mclag is
> loop-free, but I believe you want to use rstp to protect the access port.
> You should keep the tree consistent, you should config the MX as root
> bridge and both routers should advertise the same bridge identifier  (set
> protocols rstp system-identifier or set routing-instance NAME protocols
> rstp system-identifier).
>
> cheers
> Alberto
>
> On 26 January 2016 at 16:29, Tomasz Mikołajek <tmikolajek at gmail.com>
> wrote:
>
>> Hello.
>>
>> I have a question about mc-lag and rstp. RSTP is blocking Port-channel 1
>> on
>> Cisco switch which is connected to two MX routers by Mc-lag link. On MX
>> router I have configured RSTP accordig to:
>>
>>
>> http://www.juniper.net/documentation/en_US/junos13.3/topics/usage-guidelines/interfaces-configuring-multi-chassis-link-aggregation.html
>> (points 9, 10, 11). Juniper support wrote:
>>
>>
>>
>> ·         *"MC-LAG provides loop-free Layer 2 network without running
>> the Spanning Tree Protocol (STP).*
>>
>> ·
>>
>> ·         *Please refer the below links to configure the MC-LAG :*
>>
>> ·
>>
>> ·         *
>> http://www.juniper.net/documentation/en_US/junos13.3/topics/usage-guidelines/interfaces-configuring-multi-chassis-link-aggregation.html
>> <
>> http://www.juniper.net/documentation/en_US/junos13.3/topics/usage-guidelines/interfaces-configuring-multi-chassis-link-aggregation.html
>> >*
>>
>> ·
>>
>> ·         *
>> http://www.juniper.net/documentation/en_US/junos13.2/topics/concept/lag-multichassis-qfx-series-overview.html
>> <
>> http://www.juniper.net/documentation/en_US/junos13.2/topics/concept/lag-multichassis-qfx-series-overview.html
>> >"*
>>
>>
>>
>>
>>
>> Thank you in advance for help.
>> _______________________________________________
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>> https://puck.nether.net/mailman/listinfo/juniper-nsp
>
>
>