When working with Linux you get used to the way Linux does things, but when you switch from Linux to Mac OS X you notice that some things are handled differently.
One of these differences I came across recently. It's about the way you read out the routes you currently have active. I was used to the way you show them in Linux with the following command:
As we say above, to manipulate the routing table, we use the route add command ( add is the option) to manually indicate a static path that the packets will use through the network. It is used to assign a temporary static route which will change only if the administrator manually modifies the values of the new route.
- The floating static route is not installed on R1 and the primary static route is still in the routing table for R1, even though the serial port 1/0 link is shut down. This occurs because static routes are recursive in nature. You always keep the static route in the routing table as long as you have a route to the next hop.
- Mac OS X looses static routes when it is rebooted. To preserve the static route on mac we would need to create a startup script which adds your static route upon system startup. The following steps will help in achieving this.
- I found neither of the other two static route hints were working for me. Adding the route to /etc/rc.local failed to ever actually add the route. I was adding my route manually without a problem, so figured the trouble adding this at boot was related to the networking.
I like to add the '-n' parameter to not resolve the IP addresses to names. This can make the output of the routes much faster.
Mac Os Route Command
But when you switch over to OS X you will notice that the command 'route' exists but work differently. If you open the man page of 'route' on a Linux system and then on OS X you will immediately see the following difference.
The Linux man pages show you this description for the command:
But the OS X man page will only show this in the description:
The missing word 'show' gives the hint that the route command will not show us the routes as we are used to from Linux. To get a similar list of active routing entries as on Linux the following command has to be executed:
The output of the netstat command on Mac OS X is very similar to the output you are used to from Linux. The option '-r' tell netstat to show the routing table and the '-n' option as with the 'route' command avoids DNS resolution. The netstat command is used to show more then just the routing table and is also available on Linux. When executed on Linux it will show the same output as the route command.
Adding a route
For adding a route to the routing table Linux as well as OS X use the route command, but be aware that even here there are differences. In OS X, to specify a route for network 10.0.0.0/24 to be routed to gateway 10.0.0.1 you use the following command.
But if you are on a Linux system you will have to use the following command to do the same:
The syntax is very close to the syntax of OS X but it is not identical. In the OS X the destination and gateway parameter is defined by its position in the command line, the Linux command expects the parameters to be prefixed with '-net' and 'gw'.
The man page of the related commands are usually a good source of what is different between Linux and Mac OS X.
Read more of my posts on my blog at http://blog.tinned-software.net/.
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The Linux man pages show you this description for the command:
But the OS X man page will only show this in the description:
The missing word 'show' gives the hint that the route command will not show us the routes as we are used to from Linux. To get a similar list of active routing entries as on Linux the following command has to be executed:
The output of the netstat command on Mac OS X is very similar to the output you are used to from Linux. The option '-r' tell netstat to show the routing table and the '-n' option as with the 'route' command avoids DNS resolution. The netstat command is used to show more then just the routing table and is also available on Linux. When executed on Linux it will show the same output as the route command.
Adding a route
For adding a route to the routing table Linux as well as OS X use the route command, but be aware that even here there are differences. In OS X, to specify a route for network 10.0.0.0/24 to be routed to gateway 10.0.0.1 you use the following command.
But if you are on a Linux system you will have to use the following command to do the same:
The syntax is very close to the syntax of OS X but it is not identical. In the OS X the destination and gateway parameter is defined by its position in the command line, the Linux command expects the parameters to be prefixed with '-net' and 'gw'.
The man page of the related commands are usually a good source of what is different between Linux and Mac OS X.
Read more of my posts on my blog at http://blog.tinned-software.net/.
Related posts:
Static routes allow administrators to configure routes for specific hosts or networks manually as against learning dynamically using routing protocols like RIP, EIGRP and OSPF. Vuescan 9 5 54 – scanner software with advanced features. Static routes basically tells the Cisco IOS of which next hop router or the exit interface on the local router that the traffic for a particular host or network needs to be passed to.
To add a Static Route in cisco ios based switches and routers the following is the command syntax. Ireland landing card. This command is run from the global configuration mode.
SYNTAX:
ciscorouter(config)# ip route
For example,
Add Static route to a host using an exit interface
ciscorouter(config)# ip route 192.168.2.10 255.255.255.255 serial0/0/0
Where 192.168.1.1 is the host & serial0/0/0 is the exit interface on the router
Add Static route to a Network using a next hop router
ciscorouter(config)# ip route 192.168.1.0 255.255.255.0 192.168.100.1 Free casino slot games download full version.
Where 192.168.1.0 is the network & 192.168.100.1 is the next hop router
Add a default Route in Cisco IOS
To Add a default route using a Gateway IP Address (called as Gateway of last resort) as a next hop router
ciscorouter(config)# ip route 0.0.0.0 0.0.0.0 10.10.10.10
If you want to use a local exit interface
ciscorouter(config)# ip route 0.0.0.0 0.0.0.0 serial0/0/1
This should help. To display the static routes on a switch or a router use the following show command
ciscorouter# show ip route static Macbook pro not recognizing ssd.
To filter the output for a specific host or network
ciscorouter# show ip route static | include 10.10.10.100
Mac Os Route Table
S 10.10.10.100 [1/0] via 192.168.100.1
where the output is filtered to display only the static route for the host 10.10.10.100.
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