Hello everyone,

Could be a simple question. We have couple of Production servers and as
of now we don;t

have a redundancy for the IP. that means it is connected to a switch
and if the switch fails , then that's it.

We are using p690 with dual port ethernet card and the second port is
configured for Backup-Vlan .

Question is can this dual port card have multiple IP's to different
switches

Regards
RC

rcee wrote:
> Hello everyone,
>
> Could be a simple question. We have couple of Production servers and as
> of now we don;t
>
> have a redundancy for the IP. that means it is connected to a switch
> and if the switch fails , then that's it.
>
> We are using p690 with dual port ethernet card and the second port is
> configured for Backup-Vlan .

You know Etherchannel ?

hth
Hajo

In article <1156918886.885116.144350@m73g2000cwd.googlegroups .com>, Hajo Ehlers <service@metamodul.com> wrote:
> rcee wrote:
>>
>> Could be a simple question. We have couple of Production servers and as
>> of now we don;t
>>
>> have a redundancy for the IP. that means it is connected to a switch
>> and if the switch fails , then that's it.
>>
>> We are using p690 with dual port ethernet card and the second port is
>> configured for Backup-Vlan .
>
> You know Etherchannel ?

I think he is likely wanting to use VIPA (Virtual IP Address).

Etherchannel is more for boosting bandwidth... VIPA is more for
redundancy.

Also, original poster may want to consider having each switch connected
to two different routers and then using HSRP or VRRP on the routers, too.

This will remove another single point of failure (router).

-Dan

Dan Foster wrote:
> In article <1156918886.885116.144350@m73g2000cwd.googlegroups .com>, Hajo Ehlers <service@metamodul.com> wrote:
> > rcee wrote:
....
> >> configured for Backup-Vlan .
> >
> > You know Etherchannel ?
>
> I think he is likely wanting to use VIPA (Virtual IP Address).
>
> Etherchannel is more for boosting bandwidth...

It can be used for boosting bandwidth and for adaper failover. So its
redundancy on the hardware level

> VIPA is more for redundancy.
on the IP level

>
> Also, original poster may want to consider having each switch connected
> to two different routers and then using HSRP or VRRP on the routers, too.
>
> This will remove another single point of failure (router).
Then the OP should consider to implement an internet2 to remove that
spof - scnr

greetings
Hajo

On 2006-08-30, Dan Foster <usenet@evilphb.org> wrote:

>>> have a redundancy for the IP. that means it is connected to a switch
>>> and if the switch fails , then that's it.
>>>
>>> We are using p690 with dual port ethernet card and the second port is
>>> configured for Backup-Vlan .
>>
>> You know Etherchannel ?
>
> I think he is likely wanting to use VIPA (Virtual IP Address).
>
> Etherchannel is more for boosting bandwidth... VIPA is more for
> redundancy.

You can set up an EtherChannel with as many adapters as you want, and
with a backup adapter in case the primary EtherChannel fails.

This means you can set up an EtherChannel with 1 adapter, and 1 backup
adapter. Plug those in different switches, and you have your redundancy.

--
Jurjen Oskam

Savage's Law of Expediency:
You want it bad, you'll get it bad.

Thanks a lot for all the answers.

Can both the ports of the adapter have same ip connected to two
different ports on two different switches in the same VLAN .

Etherchannel , i read the switch also should be supporting

Regards


Jurjen Oskam wrote:
> On 2006-08-30, Dan Foster <usenet@evilphb.org> wrote:
>
> >>> have a redundancy for the IP. that means it is connected to a switch
> >>> and if the switch fails , then that's it.
> >>>
> >>> We are using p690 with dual port ethernet card and the second port is
> >>> configured for Backup-Vlan .
> >>
> >> You know Etherchannel ?
> >
> > I think he is likely wanting to use VIPA (Virtual IP Address).
> >
> > Etherchannel is more for boosting bandwidth... VIPA is more for
> > redundancy.
>
> You can set up an EtherChannel with as many adapters as you want, and
> with a backup adapter in case the primary EtherChannel fails.
>
> This means you can set up an EtherChannel with 1 adapter, and 1 backup
> adapter. Plug those in different switches, and you have your redundancy.
>
> --
> Jurjen Oskam
>
> Savage's Law of Expediency:
> You want it bad, you'll get it bad.

rcee wrote:
> Thanks a lot for all the answers.
>
> Can both the ports of the adapter have same ip connected to two
> different ports on two different switches in the same VLAN .
>
> Etherchannel , i read the switch also should be supporting
>

In a failover etherchannel configuration the network ports are
connected to two different switches. Since the etherchannel gets its
own network device you configure your VLAN on this device.

Example:
ent0 ( eth port 0 )
ent1 ( eth port 0 )
ent2 ( etherchannel on top of ent0 and ent1 as backup adapter )

Some smitty short cuts
smitty etherchannel
smitty vlan

The drawback is you have only one adapter aktive at a time. The
advantage is that you do depend on externel network configration and
the logic is quit simple.

But check the ibm redbook site and IBM documentation about etherchanne/
vlan and ipva to figure out the best solution for your environment

hth
Hajo

Hajo Ehlers wrote:
> rcee wrote:
>> Hello everyone,
>>
>> Could be a simple question. We have couple of Production servers and as
>> of now we don;t
>>
>> have a redundancy for the IP. that means it is connected to a switch
>> and if the switch fails , then that's it.
>>
>> We are using p690 with dual port ethernet card and the second port is
>> configured for Backup-Vlan .
>
> You know Etherchannel ?
>
> hth
> Hajo
>

EtherChannel is a technology developed by CISCO to allow two ports on a
switch to act as one - primarily to improve bandwidth. The Switch must
support EtherChannel.

In this case, IP Multipathing might be better configured in a Master /
Slave configuration so that if the primary adapter fails, the primaries
IP address can be aliased to the secondary adapter and share it's IP
address with the backup VLAN. You would need to configure your switch to
support both the subnets though but it should be possible.

On 2006-09-04, Silver Mane <silvermane@notvalid.corp> wrote:

> EtherChannel is a technology developed by CISCO to allow two ports on a
> switch to act as one - primarily to improve bandwidth. The Switch must
> support EtherChannel.

As was said before: in AIX you can take two physical interfaces and plug
each in a different switch. Then, you combine those two physical interfaces
into one logical interface, to which you can assign IP addresses, just as
you would with a normal interface. This logical interface is now redundant:
if a path fails, the other takes over. This doesn't need reconfiguration
of the switches.

The process of combining the physical interfaces into a logical one is
done by creating an EtherChannel-interface on AIX. The trick is that
you are allowed to only put one physical adapter in the EtherChannel
with the other being the backup (and not participating in the EtherChannel).
Since an EtherChannel with only one physical interface is indistinguisable
from a normal interface, the switches don't need reconfiguration.
--
Jurjen Oskam

Savage's Law of Expediency:
You want it bad, you'll get it bad.

Once again thanks a lot for all the answers.

I will have to start the testing for this .

Rgrds
RC
Jurjen Oskam wrote:
> On 2006-09-04, Silver Mane <silvermane@notvalid.corp> wrote:
>
> > EtherChannel is a technology developed by CISCO to allow two ports on a
> > switch to act as one - primarily to improve bandwidth. The Switch must
> > support EtherChannel.
>
> As was said before: in AIX you can take two physical interfaces and plug
> each in a different switch. Then, you combine those two physical interfaces
> into one logical interface, to which you can assign IP addresses, just as
> you would with a normal interface. This logical interface is now redundant:
> if a path fails, the other takes over. This doesn't need reconfiguration
> of the switches.
>
> The process of combining the physical interfaces into a logical one is
> done by creating an EtherChannel-interface on AIX. The trick is that
> you are allowed to only put one physical adapter in the EtherChannel
> with the other being the backup (and not participating in the EtherChannel).
> Since an EtherChannel with only one physical interface is indistinguisable
> from a normal interface, the switches don't need reconfiguration.
> --
> Jurjen Oskam
>
> Savage's Law of Expediency:
> You want it bad, you'll get it bad.