[dev] MPLS SWAP and POP configuration issue
Vijayalakshmi
vijayalakshmi.marudhanayagam at veryxtech.com
Tue Jul 17 07:27:38 EDT 2018
Hi Renato,
I already set and verified those parameters.
My topology is
PE1 Configuration:
root at frr:/usr/local/etc/quagga# modprobe mpls-router mpls-iptunnel
root at frr:/usr/local/etc/quagga# sysctl -p
/etc/sysctl.d/90-routing-sysctl.conf
net.ipv4.conf.all.forwarding = 1
net.ipv6.conf.all.forwarding = 1
net.mpls.conf.ens3.input = 1
net.mpls.conf.ens4.input = 1
net.mpls.conf.ens9.input = 1
net.mpls.conf.ens10.input = 1
net.mpls.platform_labels = 100000
root at frr:/usr/local/etc/quagga# ip route
default via 192.168.13.1 dev ens3 proto static
192.168.13.0/24 dev ens3 proto kernel scope link src 192.168.13.42
*192.168.123.0/24 encap mpls 100 via 192.168.200.3 dev ens9*
192.168.200.0/24 dev ens9 proto kernel scope link src 192.168.200.2
root at frr:/usr/local/etc/quagga#
PE2 Configuration:
root at frr:~/frr-4.0-vPE# modprobe mpls-router mpls-iptunnel
root at frr:~/frr-4.0-vPE# sysctl -p /etc/sysctl.d/90-routing-sysctl.conf
net.ipv4.conf.all.forwarding = 1
net.ipv6.conf.all.forwarding = 1
net.mpls.conf.ens3.input = 1
net.mpls.conf.ens4.input = 1
net.mpls.conf.ens9.input = 1
net.mpls.conf.ens10.input = 1
net.mpls.platform_labels = 100000
root at frr:~/frr-4.0-vPE#root at frr:~/frr-4.0-vPE# ip route
default via 192.168.13.1 dev ens3 proto static
192.168.13.0/24 dev ens3 proto kernel scope link src 192.168.13.43
192.168.100.0/24 dev ens4 proto kernel scope link src 192.168.100.3
192.168.111.0/24 dev ens10 proto kernel scope link src 192.168.111.3
192.168.200.0/24 dev ens9 proto kernel scope link src 192.168.200.3
root at frr:~/frr-4.0-vPE# ip route
default via 192.168.13.1 dev ens3 proto static
192.168.13.0/24 dev ens3 proto kernel scope link src 192.168.13.43
192.168.111.0/24 dev ens10 proto kernel scope link src 192.168.111.3
192.168.200.0/24 dev ens9 proto kernel scope link src 192.168.200.3
root at frr:~/frr-4.0-vPE# ip -f mpls route show
*100 dev ens10*
root at frr:~/frr-4.0-vPE#
I have a route in Host (192.168.13.40) for network 192.168.123.0/24 as
nexthop 192.168.13.42
Now I am sending ping from with destination IP 192.168.123.3
In PE1:
Receiving ICMP request in ens3 (13.42)
Receiving ICMP request with MPLS label 100 in ens9(200.2)
In PE2:
Receiving ICMP request with MPLS label 100 in ens9(200.3)
But ens9 is not forwarding the ICMP request via any other available
interface.
Expected behavior is that, it should pop the label 100 and send frame
via ens10.
Please let know your views.
Thanks,
Vijayalakshmi
On 7/16/2018 7:59 PM, Renato Westphal wrote:
> Did you enable MPLS processing on your interfaces?
>
> Please check this link:
> https://github.com/FRRouting/frr/blob/frr-5.0.1/doc/developer/building-frr-on-ubuntu1804.rst#enable-mpls-forwarding-with-linux-kernel--45
>
> Cheers,
> Renato.
>
> On Mon, Jul 16, 2018 at 10:45 AM, Vijayalakshmi
> <vijayalakshmi.marudhanayagam at veryxtech.com> wrote:
>> Hi Kishore,
>>
>> Thanks for your reply.
>>
>> I tried the same with Linux MPLS via iproute2 configuration. Still the
>> behavior is same.
>> So it is clear that the issue is not with FRR.
>>
>> Let me fix the issue in my Linux kernel and get back to you if I need any
>> support.
>>
>> Regards,
>> Vijayalakshmi
>>
>> On 7/13/2018 9:45 PM, Kishore Aramalla wrote:
>>
>> Vijayalakshmi, Can you share your configuration.
>>
>>
>>
>> Best,
>>
>> Kishore
>>
>>
>>
>> From: dev <dev-bounces at lists.frrouting.org> On Behalf Of Vijayalakshmi
>> Sent: Thursday, July 12, 2018 11:49 PM
>> To: dev at lists.frrouting.org
>> Subject: [dev] MPLS SWAP and POP configuration issue
>>
>>
>>
>> Hello,
>>
>> We are currently working with simulating a PE router in MPLS architecture.
>> We run zebra and ldp with below configuration
>> and facing issues in swapping and popping of label in zebra.
>>
>> In my MPLS table I have the following entries,
>>
>> zebra_2# show mpls table
>> Inbound Outbound
>> Label Type Nexthop Label
>> -------- ------- --------------- --------
>> 16 LDP 192.168.100.2 3
>> 17 Static 192.168.100.2 18
>>
>> But still zebra is not swapping the label and also not forwarding the
>> received traffic (inbound label 16/17) to the respective nexthop.
>>
>> Is there any special command to activate mpls configuration ?
>> Can someone help us in a configuring zebra MPLS to pop label and swap label?
>>
>> Thanks,
>> Vijayalakshmi
>>
>>
>>
>> _______________________________________________
>> dev mailing list
>> dev at lists.frrouting.org
>> https://lists.frrouting.org/listinfo/dev
>>
>
>
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