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Archived from groups: comp.dcom.lans.ethernet,comp.protocols.tcp-ip (More info?)
We have a private network consisting of 10/100 switches that have 1
gigbit input and output. The switches are daisy chained using fiber
connections between switches. For very short distances, the connection
between switches might be copper. The communications will be using IP.
We want to develop an automated method of assigning fixed IP addresses
to nodes on the switches based on their location in the daisy chain.
For example, a node on the second switch would be assigned a
192.168.2.x address. Is there a way of determining the switch location
at startup so an IP address can be assigned in such a way? One thought
was using the TTL in an IP frame similar to what tracert does but I
don't think switches are considered as a hop and so don't decrement the
TTL. This would be done from a master node that is connected to the
first switch via a 1 GB link. Another thought was using a round trip
propagation delay for a packet to determine their distance from the
master node. Is this possible? The thought was that the switch nodes
would come up with a random address and would notify the master node
who then would assign them a new address. We have complete control of
the software running on the switch nodes as far as changing IP
addresses. Any other suggestions are welcome?
Another question I have is what the limitations are on the number of
switches in this daisy chain.
We have a private network consisting of 10/100 switches that have 1
gigbit input and output. The switches are daisy chained using fiber
connections between switches. For very short distances, the connection
between switches might be copper. The communications will be using IP.
We want to develop an automated method of assigning fixed IP addresses
to nodes on the switches based on their location in the daisy chain.
For example, a node on the second switch would be assigned a
192.168.2.x address. Is there a way of determining the switch location
at startup so an IP address can be assigned in such a way? One thought
was using the TTL in an IP frame similar to what tracert does but I
don't think switches are considered as a hop and so don't decrement the
TTL. This would be done from a master node that is connected to the
first switch via a 1 GB link. Another thought was using a round trip
propagation delay for a packet to determine their distance from the
master node. Is this possible? The thought was that the switch nodes
would come up with a random address and would notify the master node
who then would assign them a new address. We have complete control of
the software running on the switch nodes as far as changing IP
addresses. Any other suggestions are welcome?
Another question I have is what the limitations are on the number of
switches in this daisy chain.