HSRP

[Maverick8673]

Question! When setting up HSRP is there any down time involved with the programming, I have an active router that needs to participate in the scheme I would like to program this setup during work hours and not after hours? Any insight would be greaty appricaited.

Thanks,

 

[lgarner]

No. HSRP puts in place a virtual address. You can do it during production hours, and change your network devices to reference the virtual address later, after you've tested it. Naturally, testing will entail downtime.

 

[EddieVenus]

short answer: yes it will require downtime

long answer: there are ways you can do it that will mitigate the downtime. you may lose communications through certain interfaces or need to change gateways somewhere or make other network changes, but it may be done. you may need to take quite a bit of time to pre stage all your commands in a text file and cut and paste them, but you could probably do it.

eddie venus

 

[lambent]

Say if the interface IP is 10.0.0.1 and all of your PC is using this as the current default gateway, then probably you'll want your HSRP VIP to be 10.0.0.1 so that you won't need to change the PC settings or DHCP or whatever that involves changing the gateway IP since this probably causes significant downtime.

In this case, you may have to change the interface IP to other IP address first, say 10.0.0.2. I'm not sure if there's any way to make it without downtime, but I believe it'll be much simpler if you can request for a downtime in this case.

 

[Maverick8673]

Thanks for all the advice, wanted to avoid having to do this druing off hours since off hours are 2am to 6am but that is what makes this fun... Thanks again for the info.

 

[Maverick8673]

more help I have traffic routing over Frame-relay I am imputtting DSL failover but I want several users to use the DSL exclusive but all other traffic routed frame.

 

[lgarner]

A little more involved... Policy-based routing is what you want to set a route based on the source.

 

[Maverick8673]

How does this work with both routes doing DHCP for 2 different networks?

 

[lgarner]

Policy-based routing allows you to create an ACL and set the next hop based upon that. Since you want "several users" to route via a specific next hop, the DSL, you would create an ACL to permit all traffic from them to anywhere, and set the next hop for traffic which passes the ACL.

I'm not sure what you mean by "both routes doing DHCP". Are the users getting their addresses via DHCP? If so, change them to static addresses. If you have two networks, and all the users to use the DSL are on one, then you just use that network as the source in your ACL.