I work for a small department within a technical college that has a dedicated internet connection. I was hired about 7 months ago to handle general tech support fresh out of a 2-year program. This is my first experience working with Cisco hardware, and a network of this size. I've learned a good bit as I go along, and understand how to poke around in the router to see various things, but do not have the extra equipment or software to let me play with settings in a safe environment.
Our Cisco 2821 router supports our internal network and 6 VPNs to sites across the state. The person who created the network left before I arrived, and did not document anything about the network. I've been told repeatedly that it is essential that the VPNs remain unchanged and functioning during the school year.
We are adding a new system to our network that will require a fair number of static IP addresses on the internal network. I have been asked to decrease our DHCP pool so we have more addresses to statically assign.
I've been researching how to increase the DHCP excluded-address list that is already set up for our internal network. So far, I have found no documentation on how to change or edit an existing DHCP setup, only how to create a new one. In all the forums I've searched, with the exception of 1-2 people, the general consensus seems to be that the excluded-addresses list cannot be edited because it needs to be established before you setup the DHCP pool. The whole DHCP pool needs to be recreated.
My Questions:
Can you edit an excluded-address list without starting over?
If I have to recreate the whole DHCP pool for the internal network, will it affect the VPNs in any way? (I am assuming not because the current router IP will remain the same)
If/When I recreate the DHCP pool, do I have to do anything special first like shut down the DHCP service?
I would greatly appreciate the help!
Our Cisco 2821 router supports our internal network and 6 VPNs to sites across the state. The person who created the network left before I arrived, and did not document anything about the network. I've been told repeatedly that it is essential that the VPNs remain unchanged and functioning during the school year.
We are adding a new system to our network that will require a fair number of static IP addresses on the internal network. I have been asked to decrease our DHCP pool so we have more addresses to statically assign.
I've been researching how to increase the DHCP excluded-address list that is already set up for our internal network. So far, I have found no documentation on how to change or edit an existing DHCP setup, only how to create a new one. In all the forums I've searched, with the exception of 1-2 people, the general consensus seems to be that the excluded-addresses list cannot be edited because it needs to be established before you setup the DHCP pool. The whole DHCP pool needs to be recreated.
My Questions:
Can you edit an excluded-address list without starting over?
If I have to recreate the whole DHCP pool for the internal network, will it affect the VPNs in any way? (I am assuming not because the current router IP will remain the same)
If/When I recreate the DHCP pool, do I have to do anything special first like shut down the DHCP service?
I would greatly appreciate the help!
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