Sets how long selected interface is disabled when loop is detected. Loop-protect-disable-time ( time interval | 0 Default: 5m) Sets how often loop protect packets are sent on selected interface. Loop-protect-send-interval ( time interval Default: 5s) Remember that control flow commands are the commands that enable a program to branch between alternatives, or to take decisions, so to speak. Loop-protect ( on | off | default Default: default)Įnables or disables loop protect on selected interface. According to the R base manual, among the control flow commands, the loop constructs are for, while and repeat, with the additional clauses break and next. Sub-menu: /interface ethernet /interface vlan /interface eoip /interface eoipv6 Properties Property Note: Even though loop-protect can work on interfaces that are added to a bridge, it is still recommended to use (R/M)STP rather than loop-protect since (R/M)STP is compatible with most switches STP variants provide much more configuration options to fine-tune your network. Configuration changes or expiration of disable time resets loop protection on interface. C) You can not use duplicate CASE Constants inside a Switch construct. B) break causes the control to exit the switch immediately and avoid fall down to other CASE statements. A) default case is optional inside switch. There is support for adjusting loop protect packet sending interval and interface disable time. 15) Choose a correct statement about a C Switch Construct. Loop Protect works on ethernet, vlan, eoip and eoipv6 interfaces and its packets are encapsulated with EtherType 0x9003. Note: Even though loop-protect can work on interfaces that are added to a bridge, it is still recommended to use (R/M)STP rather than loop-protect since (R/M)STP is compatible with most switches STP variants provide much more configuration options to fine-tune your network. We can rewrite that last example with continue statements so that only one statement executes. RouterOS loop protect feature can be used on bridged interfaces as well as on ethernet interfaces which are set for switching in RouterBoard switch chips. Just like with a foreach loop, continue continues onto the next item in the collection or exits the switch if there are no more items. Log message warns about this event and interface is marked with a loop protect comment by system. If the match is found, loop protect disables the interface which received the loop protect packet.
#SWITCH LOOP IN R DEFAULT MAC#
The feature works by checking source MAC address of received loop protect packet against MAC addresses of loop protect enabled interfaces. This maps case2 and case3 to 2.5 and the (unnamed) default to 99.Loop protect feature can prevent Layer2 loops by sending loop protect protocol packets and shutting down interfaces in case they receive loop protect packets originated from themselves. We also have to set default gateway IP address from global configuration mode. However a problem with the switch statement is, when the matching value is found, it executes all statements after it until the end of switch block. To manage entire switch we have to assign IP address to VLAN1( Default VLAN of switch). The default statement at the end of switch is similar to the else block in if else statement.
#SWITCH LOOP IN R DEFAULT UPDATE#
> microbenchmark(test1('trimmed'), test2('trimmed'), times=1e6)Ģ test2("trimmed") 2022 2133 2203 2309 60814430įinal Update Here's showing how versatile switch is: switch(type, case1=1, case2=, case3=2.5, 99) But, if none of the above cases matches the expression, the statements inside default block is executed.
#SWITCH LOOP IN R DEFAULT CODE#
So that, and the fact that the code is shorter/neater with a switch statement leans in favor of switch: # Simplified to only measure the overhead of switch vs if It seems switch is generally faster than if statements.