Prefix-list length value when specifying as source in RIP distribute-list
Hope you can help, I am studying INE's RIP Adv. Technology videos at the moment. I am on the last RIP video regarding filters. My understanding of prefix-list "ge" & "le" values are they are referencing the subnet/length field of the RIP advertisement. See example:
R5(config-router)# distribute-list prefix ALL gateway NO_R3 in tunnel0
R5(config)# ip prefix-list NO_R3 deny 18.104.22.168/32
R5(config)# ip prefix-list NO_R3 permit 0.0.0.0/0 le 32 -> "le 32" why do we need this & what does it reference?
R5(config)# ip prefix-list ALL permit 0.0.0.0/32 le 32 -> "le 32" references the subnet/length field of RIP advertisement
If am configuring this example as per INE video, I am using two prefix-lists one for RIP routes we want to receive & another to specify the source of RIP advertisements. Obviously the second prefix-list to specify the source of advertisements will reference the source address field of the IP header, there is no subnet mask field in an IP header so why do we need to use "le" at the end of the syntax?
Any help is much appreciated.