Mit jelent a * karakter az alábbi kimenetben?
M2515-B# show ip route 1.0.0.0
Routing entry for 1.0.0.0/8
Known via "rip", distance 120, metric 1
Redistributing via rip
Advertised by rip (self originated)
Last update from 192.168.75.7 on Serial1, 00:00:00 ago
Routing Descriptor Blocks:
* 192.168.57.7, from 192.168.57.7, 00:00:18 ago, via Serial0
Route metric is 1, traffic share count is 1
192.168.75.7, from 192.168.75.7, 00:00:00 ago, via Serial1
Route metric is 1, traffic share count is 1
Ha ráfrissítesz a parancsra akkor a * karakter ugrál a két route között.
A jelentése pedig: equal-cost route esetén merre megy a következő csomag/flow. Ez a kimenet CEF-nél már nem igazán játszik, de a régi process/fast switched időkben volt jelentősége.
You can usually use the show ip route command to find equal cost routes. For example, below is the show ip route command output to a particular subnet that has multiple routes. Notice there are two routing descriptor blocks. Each block is one route. There is also an asterisk (*) next to one of the block entries. This corresponds to the active route that is used for new traffic. The term ‘new traffic’ corresponds to a single packet or an entire flow to a destination, depending on the type of switching configured.
- For process-switching—load balancing is on a per-packet basis and the asterisk (*) points to the interface over which the next packet is sent.
- For fast-switching—load balancing is on a per-destination basis and the asterisk (*) points to the interface over which the next destination-based flow is sent.
The position of the asterisk (*) keeps rotating among the equal cost paths each time a packet/flow is served.
(forrás)
