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FlexLink functionality for FastIrons

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robhass at gmail

Dec 20, 2011, 1:38 PM

Post #1 of 10 (1063 views)
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FlexLink functionality for FastIrons

Hi

I'm using FlexLink functionality on one project where we currently
have Cisco switches. We would like to migrate to Brocade (probably
FastIron CX).
My question is : is FastIron 7.2 or 7.3 supports similar feature to
Cisco FlexLink ?

http://www.cisco.com/en/US/docs/routers/7600/ios/12.2SXF/configuration/guide/flexlink.pdf

Thanks
Robert
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helmwork at ruraltel

Dec 20, 2011, 1:57 PM

Post #2 of 10 (1015 views)
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Re: FlexLink functionality for FastIrons [In reply to]

On 12/20/2011 3:38 PM, Robert Hass wrote:
> Hi
>
> I'm using FlexLink functionality on one project where we currently
> have Cisco switches. We would like to migrate to Brocade (probably
> FastIron CX).
> My question is : is FastIron 7.2 or 7.3 supports similar feature to
> Cisco FlexLink ?
>
> http://www.cisco.com/en/US/docs/routers/7600/ios/12.2SXF/configuration/guide/flexlink.pdf
>

Yes... they call the feature "Protected Link Groups"

/Eric
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rajasuperman at gmail

Dec 21, 2011, 9:59 AM

Post #3 of 10 (1005 views)
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Re: FlexLink functionality for FastIrons [In reply to]

On Wed, Dec 21, 2011 at 3:27 AM, Eric Helm <helmwork [at] ruraltel> wrote:
> Yes... they call the feature "Protected Link Groups"

We have a large campus LAN with +150 FI switches in a traditional design
with edge and aggregation in each building and a campus core. We're using
switched edge/aggregation with routing only on the core for all our 70 VLANs.

Is there any way of isolating STP issues at the edge/aggregation/building and
ensure they are not passed on to the core? I want to prevent potential campus
wide outage due to local STP issues at the edge.

Would this Protected Link Groups feature be something to consider using
between our aggregation and core?

TIA

- Raja
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rajasuperman at gmail

Dec 21, 2011, 10:01 AM

Post #4 of 10 (1005 views)
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Re: FlexLink functionality for FastIrons [In reply to]

On Wed, Dec 21, 2011 at 3:27 AM, Eric Helm <helmwork [at] ruraltel> wrote:
> Yes... they call the feature "Protected Link Groups"

We have a large campus LAN with +150 FI switches in a traditional 3 tier
design with edge and aggregation in each building and a campus core. We're
using switched edge/aggregation with routing only on the core for all our 70
odd VLANs.

Is there any way of isolating STP issues at the edge/aggregation/building and
ensure they are not passed on to the core? I want to prevent potential campus
wide outage due to local STP issues at the edge.

Would this Protected Link Groups feature be something to consider using
between our aggregation and core?

TIA

- Raja
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rajasuperman at gmail

Dec 21, 2011, 10:02 AM

Post #5 of 10 (1009 views)
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Re: FlexLink functionality for FastIrons [In reply to]

Sorry for the double post!

- Raja

On Wed, Dec 21, 2011 at 11:31 PM, Raja Subramanian
<rajasuperman [at] gmail> wrote:
> On Wed, Dec 21, 2011 at 3:27 AM, Eric Helm <helmwork [at] ruraltel> wrote:
>> Yes... they call the feature "Protected Link Groups"
>
> We have a large campus LAN with +150 FI switches in a traditional 3 tier
> design with edge and aggregation in each building and a campus core. We're
> using switched edge/aggregation with routing only on the core for all our 70
> odd VLANs.
>
> Is there any way of isolating STP issues at the edge/aggregation/building and
> ensure they are not passed on to the core? I want to prevent potential campus
> wide outage due to local STP issues at the edge.
>
> Would this Protected Link Groups feature be something to consider using
> between our aggregation and core?
>
> TIA
>
> - Raja
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nick at foobar

Dec 21, 2011, 10:11 AM

Post #6 of 10 (1003 views)
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Re: FlexLink functionality for FastIrons [In reply to]

On 21/12/2011 18:01, Raja Subramanian wrote:
> We have a large campus LAN with +150 FI switches in a traditional 3 tier
> design with edge and aggregation in each building and a campus core. We're
> using switched edge/aggregation with routing only on the core for all our 70
> odd VLANs.
>
> Is there any way of isolating STP issues at the edge/aggregation/building and
> ensure they are not passed on to the core? I want to prevent potential campus
> wide outage due to local STP issues at the edge.

The best way to avoid problems spreading throughout a gigantic layer 2
network is not to have gigantic single-domain layer 2 network. This may
require a substantial network redesign.

> Would this Protected Link Groups feature be something to consider using
> between our aggregation and core?

No, won't make any difference. If you have STP problems at your network
edge causing problems in your core, then failing over to a separate path to
the core is just going to give the STP problems a different path for
spreading to your core.

Nick

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robhass at gmail

Dec 22, 2011, 4:50 AM

Post #7 of 10 (1003 views)
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Re: FlexLink functionality for FastIrons [In reply to]

On Tue, Dec 20, 2011 at 10:57 PM, Eric Helm <helmwork [at] ruraltel> wrote:
> Yes... they call the feature "Protected Link Groups"

Thanks Eric. Unfortunately according to docs it will not work with
LACP trunks. And this is our requirement as non-LCAP links can be up
then device is freezes LACP keepalives are solution here. It works in
Cisco, so we have to upgrade another time to Cisco.
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mkassawara at gmail

Dec 22, 2011, 7:06 AM

Post #8 of 10 (1003 views)
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Re: FlexLink functionality for FastIrons [In reply to]

You can use UDLD with protected link groups on Brocade equipment to
provide similar functionality to LACP keepalives. Also, have you
considered configuring simultaneous utilization of all links between
devices instead of active/standby?

On Thu, Dec 22, 2011 at 5:50 AM, Robert Hass <robhass [at] gmail> wrote:
> On Tue, Dec 20, 2011 at 10:57 PM, Eric Helm <helmwork [at] ruraltel> wrote:
>> Yes... they call the feature "Protected Link Groups"
>
>
> Thanks Eric. Unfortunately according to docs it will not work with
> LACP trunks. And this is our requirement as non-LCAP links can be up
> then device is freezes LACP keepalives are solution here. It works in
> Cisco, so we have to upgrade another time to Cisco.
> _______________________________________________
> foundry-nsp mailing list
> foundry-nsp [at] puck
> http://puck.nether.net/mailman/listinfo/foundry-nsp
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robhass at gmail

Dec 22, 2011, 11:39 AM

Post #9 of 10 (1020 views)
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Re: FlexLink functionality for FastIrons [In reply to]

I have transparent bridges (fw) without spt and the problem is not
with switches redundancy where we already can use mct like solutions
(two fcx stacked or cat3750). But as our l2 fw doesn't support spt
then flexlink/protected-links-group is only way to have redundancy.
Udld is not supported on these firewalls, only lacp.

On 12/22/11, Matt Kassawara <mkassawara [at] gmail> wrote:
> You can use UDLD with protected link groups on Brocade equipment to
> provide similar functionality to LACP keepalives. Also, have you
> considered configuring simultaneous utilization of all links between
> devices instead of active/standby?
>
> On Thu, Dec 22, 2011 at 5:50 AM, Robert Hass <robhass [at] gmail> wrote:
>> On Tue, Dec 20, 2011 at 10:57 PM, Eric Helm <helmwork [at] ruraltel> wrote:
>>> Yes... they call the feature "Protected Link Groups"
>>
>>
>> Thanks Eric. Unfortunately according to docs it will not work with
>> LACP trunks. And this is our requirement as non-LCAP links can be up
>> then device is freezes LACP keepalives are solution here. It works in
>> Cisco, so we have to upgrade another time to Cisco.
>> _______________________________________________
>> foundry-nsp mailing list
>> foundry-nsp [at] puck
>> http://puck.nether.net/mailman/listinfo/foundry-nsp
>

--
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mkassawara at gmail

Dec 22, 2011, 12:10 PM

Post #10 of 10 (1008 views)
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Re: FlexLink functionality for FastIrons [In reply to]

I don't have a clear picture of your network design, but can the
firewalls pass keepalives transparently between switches on either
side?

On Thu, Dec 22, 2011 at 12:39 PM, Robert Hass <robhass [at] gmail> wrote:
> I have transparent bridges (fw) without spt and the problem is not
> with switches redundancy where we already can use mct like solutions
> (two fcx stacked or cat3750). But as our l2 fw doesn't support spt
> then flexlink/protected-links-group is only way to have redundancy.
> Udld is not supported on these firewalls, only lacp.
>
>
> On 12/22/11, Matt Kassawara <mkassawara [at] gmail> wrote:
>> You can use UDLD with protected link groups on Brocade equipment to
>> provide similar functionality to LACP keepalives. �Also, have you
>> considered configuring simultaneous utilization of all links between
>> devices instead of active/standby?
>>
>> On Thu, Dec 22, 2011 at 5:50 AM, Robert Hass <robhass [at] gmail> wrote:
>>> On Tue, Dec 20, 2011 at 10:57 PM, Eric Helm <helmwork [at] ruraltel> wrote:
>>>> Yes... they call the feature "Protected Link Groups"
>>>
>>>
>>> Thanks Eric. Unfortunately according to docs it will not work with
>>> LACP trunks. And this is our requirement as non-LCAP links can be up
>>> then device is freezes LACP keepalives are solution here. It works in
>>> Cisco, so we have to upgrade another time to Cisco.
>>> _______________________________________________
>>> foundry-nsp mailing list
>>> foundry-nsp [at] puck
>>> http://puck.nether.net/mailman/listinfo/foundry-nsp
>>
>
> --
> Sent from my mobile device
> _______________________________________________
> foundry-nsp mailing list
> foundry-nsp [at] puck
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