is there not any other way without two network cards ?I am looking only at switch level
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redundant switch configuration
Hi
I have 10 hosts connecting to one switch (3560-layer3)for Internet access.This switch is connected to our ISP.How can I make sure that these 10 hosts continue to surf internet acces even when the switch hardware/port fails ?Please paste sample config if I have to setup another switch
Thanks
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Answers
I am surprised to see that in such a High tech era switch is still the Point of failure if dual NICs are not used in the host....
I have a device (2 firewalls and 3 servers ) that has an ip addresses 10.32.1.1 ,10.32.1.2,10.32.1.3,10.32
If you have a server plugged into a switch with a single NIC, and that switch goes down, regardless of how many other switches you have in your network, that server is SOL.
You need two NICs in each server, two switches, and redundant connections to the internet. HSRP is a FHRP, which does you absolutely no good if Layer1 is down.
Think of this logicaly!!
How can one NIC possible have redundency. it can only have one physical connection between it and the switch. this means there are three single points of failer
the NIC, the switch port (port or switch its all the same to the host) and the cable its self.
and no you dont chage ip address,
you simple loadbalance over the nics. ie two physical cables become one logical connection. so as far as the network is conserned it still only has one connection with one IP address.
I don't get how with current laws of physics, you can see how to get redundency with a single cable going to a single switch port. no matter how much "Switch" redundency you have..
what you are talking about is port redundency and that is not something that exists.
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by: donjohnstonPosted on 2009-08-17 at 13:33:01ID: 25118100
It would require that each host have two separate network cards with each one going to a different switch.