vampirevicky
MIS
I have a very basic question which troubled me all along. A one to one FR is easy to understand...but consider a a FR where many networks are connected to each other. As I understand the FR creats virtual isolated pipes of data between intended sources and recepients and helps in reducing the number of ports required as mulplexing of data channels take place. That apart there are QOS benefits.
If FR works on inverse arp say and we dont give exlicit map statements to map a local dlci to a remote destination ip by hand then how does this in-arp happen automatically. How does a rtr multicast to all possible FR switches and then reach exactly the intended remote dlci that forms the virtual circuit. Coz it wud have to reach the other end of the VC to retreive the layer 3 information. Only then it can automap. Does that mean that FR switches have ports assigned for various dlci's and it has already been programmed onto the switches that a said dlci hooks up to a said dlci, coz only then can one end can hook up with the other end to retrieve the ip address needed for in-arp. Even if we consider that fr interfaces are sending hello packets thru LMI data transmission between rtr and FR switch, the switch wud know that so and so ip with so and so dlci is at so and so port of mine, but still the FR switch wud have to know that so and so dlci has to hook up with so and so dlci. How does this happen...Cudnt understand this all throughout. This is a bit too late to be asking this question but never late than never.
Thanks,
Vikram
SAP BASIS R3\IBM AIX\Tivoli Administrator, CCNA
If FR works on inverse arp say and we dont give exlicit map statements to map a local dlci to a remote destination ip by hand then how does this in-arp happen automatically. How does a rtr multicast to all possible FR switches and then reach exactly the intended remote dlci that forms the virtual circuit. Coz it wud have to reach the other end of the VC to retreive the layer 3 information. Only then it can automap. Does that mean that FR switches have ports assigned for various dlci's and it has already been programmed onto the switches that a said dlci hooks up to a said dlci, coz only then can one end can hook up with the other end to retrieve the ip address needed for in-arp. Even if we consider that fr interfaces are sending hello packets thru LMI data transmission between rtr and FR switch, the switch wud know that so and so ip with so and so dlci is at so and so port of mine, but still the FR switch wud have to know that so and so dlci has to hook up with so and so dlci. How does this happen...Cudnt understand this all throughout. This is a bit too late to be asking this question but never late than never.
Thanks,
Vikram
SAP BASIS R3\IBM AIX\Tivoli Administrator, CCNA