11-18-2002 06:05 PM - edited 03-02-2019 02:58 AM
Is adding a second IP address to a router with only one ethernet interface the best solution when more IP addresses are needed on a LAN and the other subnet being used has had all the IP addresses exhausted? Will there be a performance issue if I add 12 more hosts from a different subnet on the same switch where there are 35 other hosts from another subnet within the same VLAN? I cannot use subinterfaces and ISL trunking since the ethernet interface is not a fastethernet interface.
Thanks,
RJ
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11-18-2002 06:33 PM
Since you dont have a fast ethernet interface, the only option you have is to use secondary ip addresses.
Adding 1 more subnet to the router ethernet interface as secondary shouldnt be a problem.
One thing to be noticed is that, the bandwidth of the link between the switch and the router will be shared with 12 more additional hosts, during communication between the 2 subnets. ( this case arises when all hosts are communicating simult., which is less likely).
Obviously there is a small percentage of load on the router, because it has to route more packets, not only to the wan, but also between the subnets.
11-18-2002 06:33 PM
Since you dont have a fast ethernet interface, the only option you have is to use secondary ip addresses.
Adding 1 more subnet to the router ethernet interface as secondary shouldnt be a problem.
One thing to be noticed is that, the bandwidth of the link between the switch and the router will be shared with 12 more additional hosts, during communication between the 2 subnets. ( this case arises when all hosts are communicating simult., which is less likely).
Obviously there is a small percentage of load on the router, because it has to route more packets, not only to the wan, but also between the subnets.
11-19-2002 09:21 AM
Once again, thanks for your insight.
RJ
11-20-2002 01:07 AM
In some higher IOS version, you can configure the ethernet to trunk dot1q. I ever test the configuration, and it work well.
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