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linuxlinux-kernelroutesnetlinkiproute

iproute2 commands for MPLS configuration

Trying to figure out how one can use iproute2 to manage static label-switched MPLS routes in Linux kernel 4.1.

I am aware iproute2 support for MPLS might be incomplete right now [2].

Can anyone please shed some light on what iproute2-4.1.1 is currently able to do?

This is what I have found so far:

Documentation/networking/mpls-sysctl.txt

/proc/sys/net/mpls/platform_labels /proc/sys/net/mpls/conf//input

Load mpls module

sudo modprobe mpls_router

Find sysctl support

sysctl -a --pattern mpls 
net.mpls.conf.eth0.input = 0 
net.mpls.conf.eth1.input = 0 
net.mpls.conf.lo.input = 0 
net.mpls.platform_labels = 0

Enable mpls support

sudo sysctl -w net.mpls.conf.eth0.input=1 
sudo sysctl -w net.mpls.conf.eth1.input=1 
sudo sysctl -w net.mpls.platform_labels=1000

push??? (how to add prefix-to-push action?)

sudo ip route add 1.1.1.1/32 via mpls 100/200/300 dev eth0

swap??? (how to add label-swap action?)

sudo ip -f mpls route add 10 via mpls 100/200/300 dev eth0

pop??? (how to add label-pop action?)

???

show??? (how to display label-switched routes?)

???

Can someone help me out . Thanks in Advance.

Solution

  • A little bit too late, but hope it helps somebody. You can find them here:

    Routing 10.10.10.10/32 to 192.168.1.2 with label 100: 

    ip route add 10.10.10.10/32 encap mpls 100 via inet 192.168.1.2

    Label swapping 100 for 200 and sent to 192.168.2.2: 

    ip -f mpls route add 100 as 200 via inet 192.168.2.2

    Decapsulating label 300 and delivering locally: 

    ip -f mpls route add 300 dev lo

    To show MPLS routes you can do:

    ip -f mpls route show

    If your iproute2 version doesn't support those commands, you can get it from here:

    https://www.kernel.org/pub/linux/utils/net/iproute2/iproute2-4.6.0.tar.gz

    And then 

    ./configure && make && make install