Community discussions

MikroTik App
 
User avatar
edielson_atm
Trainer
Trainer
Topic Author
Posts: 28
Joined: Tue May 29, 2007 5:23 am
Location: Brasilia - Brasil
Contact:

v7.1 MPLS/VPLS with IPv4/IPv6 ldp question

Sat Mar 26, 2022 3:43 pm

When configuring MPLS/VPLS with LDP signaling, there is a bug if using IPv6, it only works if only using LDP IPv4

VPLS with IPv4-only LDP
Captura de Tela 2022-03-26 às 10.37.51.png
Now if we activate ipv6

Captura de Tela 2022-03-26 às 10.40.05.png
the only thing that was to change and activate IPV6 so that the ipv6 packets also pass through the MPLS after that the VPLS falls and doesn't work until you disable the ipv6 option of the LDP Instance
You do not have the required permissions to view the files attached to this post.
 
User avatar
nichky
Forum Guru
Forum Guru
Posts: 1119
Joined: Tue Jun 23, 2015 2:35 pm

Re: v7.1 MPLS/VPLS with IPv4/IPv6 ldp question

Sun Mar 27, 2022 9:49 am

Thanks for that.

i didn't test mpls in v7.
I thing that i need to wait for a bit.
While we are here,im wondering what VRF doen on LDP interface
 
User avatar
IPANetEngineer
Trainer
Trainer
Posts: 1676
Joined: Fri Aug 10, 2012 6:46 am
Location: iparchitechs.com
Contact:

Re: v7.1 MPLS/VPLS with IPv4/IPv6 ldp question

Sun Apr 03, 2022 3:54 pm

I ran into a similar issue. In 7.2rc7, the IPv4 afi works by itself and the ipv6 afi does too. But if you use the IPv4 and IPv6 afi together, LDP becomes non-functional and targeted LDP for VPLS stops working for IPv4 and IPv6.

Submitted this as a bug to MikroTik (SUP-78710)

if the ip afi is set, ldp becomes operational and VPLS works
[zuul@ccr2004-2splus-01.test.lab.ipa] > mpls/export 

/mpls interface
add input=yes interface=vlan3100 mpls-mtu=1530
add input=yes interface=vpls-101-ipv6
add input=yes interface=vpls-101-ipv4
/mpls ldp
add afi=ip disabled=no lsr-id=100.127.1.1 transport-addresses=100.127.1.1
/mpls ldp interface
add afi=ipv6 disabled=yes interface=vlan3100 transport-addresses=200:127:1::1
add afi=ip disabled=no interface=vlan3100 transport-addresses=100.127.1.1


[zuul@ccr2004-2splus-01.test.lab.ipa] > mpls/ldp/neighbor/print 
Flags: D, I - INACTIVE; O, T - THROTTLED; t - SENDING-TARGETED-HELLO; v - VPLS; p - PASSIVE
Columns: TRANSPORT, LOCAL-TRANSPORT, PEER, ADDRESSES
#       TRANSPORT    LOCAL-TRANSPORT  PEER           ADDRESSES   
0 DOtvp 100.127.1.2  100.127.1.1      100.127.1.2:0  10.255.44.15
                                                     100.126.1.9 
                                                     100.127.1.2 
                                                     198.18.0.2  
                                                     203.0.113.2 
1 DO  p 100.127.1.3  100.127.1.1      100.127.1.3:0  10.255.44.23
                                                     100.126.1.2 
                                                     100.126.1.10
                                                     100.127.1.3 

if the ipv6 afi is set, ldp becomes operational and VPLS works
[zuul@ccr2004-2splus-01.test.lab.ipa] > mpls/export 

/mpls interface
add input=yes interface=vlan3100 mpls-mtu=1530
add input=yes interface=vpls-101-ipv6
add input=yes interface=vpls-101-ipv4
/mpls ldp
add afi=ipv6 disabled=no lsr-id=100.127.1.1 transport-addresses=200:127:1::1
/mpls ldp interface
add afi=ipv6 disabled=no interface=vlan3100 transport-addresses=200:127:1::1
add afi=ip disabled=yes interface=vlan3100 transport-addresses=100.127.1.1
[zuul@ccr2004-2splus-01.test.lab.ipa] > 

[zuul@ccr2004-2splus-01.test.lab.ipa] > mpls/ldp/neighbor/print
Flags: D, I - INACTIVE; O, T - THROTTLED; t - SENDING-TARGETED-HELLO; v - VPLS; p - PASSIVE
Columns: TRANSPORT, LOCAL-TRANSPORT, PEER, ADDRESSES
#       TRANSPORT     LOCAL-TRANSPORT  PEER           ADDRESSES                         
0 DOtvp 200:127:1::2  200:127:1::1     100.127.1.2:0  200:126:2::2                      
                                                      200:127:1::2                      
                                                      203:0:113::2                      
                                                      fc00:da7a:44:1:de2c:6eff:fe8a:990d
                                                      fe80::87:6fff:fe98:ee32           
                                                      fe80::1458:daff:fe81:387e         
                                                      fe80::9472:c1ff:fe70:168f         
                                                      fe80::de2c:6eff:fe8a:990d         
                                                      fe80::de2c:6eff:fe8a:990f         
1 DO  p 200:127:1::3  200:127:1::1     100.127.1.3:0  200:126:1::3                      
                                                      200:126:2::3                      
                                                      200:127:1::3                      
                                                      fe80::1458:daff:fe81:387e         
                                                      fe80::9472:c1ff:fe70:168f         
                                                      fe80::de2c:6eff:fe7a:d0e6         
                                                      fe80::de2c:6eff:fe7a:d0f6         

if the ip and ipv6 afi is set, ldp for IPv6 becomes operational but ldp for IPv4 does not. After rebooting the router, LDPv6 neighbors will become operational, but targeted LDP for VPLS over the LDPv6 neighbors no longer functions.
[zuul@ccr2004-2splus-01.test.lab.ipa] > mpls/export 
# apr/03/2022 08:24:25 by RouterOS 7.2rc7
# software id = XF0U-LU9N
#
# model = CCR2004-16G-2S+
# serial number = HBJ07YRKGA0
/mpls interface
add input=yes interface=vlan3100 mpls-mtu=1530
add input=yes interface=vpls-101-ipv6
add input=yes interface=vpls-101-ipv4
/mpls ldp
add afi=ip,ipv6 disabled=no lsr-id=100.127.1.1 transport-addresses=100.127.1.1,200:127:1::1
/mpls ldp interface
add afi=ipv6 disabled=no interface=vlan3100 transport-addresses=200:127:1::1
add afi=ip disabled=no interface=vlan3100 transport-addresses=100.127.1.1
[zuul@ccr2004-2splus-01.test.lab.ipa] > 

[zuul@ccr2004-2splus-01.test.lab.ipa] > mpls/ldp/neighbor/print
Flags: D, I - INACTIVE; O, T - THROTTLED; t - SENDING-TARGETED-HELLO; v - VPLS; p - PASSIVE
Columns: TRANSPORT, LOCAL-TRANSPORT, PEER, ADDRESSES
#       TRANSPORT     LOCAL-TRANSPORT  PEER           ADDRESSES                         
0 DOtvp 200:127:1::2  200:127:1::1     100.127.1.2:0  200:126:2::2                      
                                                      200:127:1::2                      
                                                      203:0:113::2                      
                                                      fc00:da7a:44:1:de2c:6eff:fe8a:990d
                                                      fe80::87:6fff:fe98:ee32           
                                                      fe80::1458:daff:fe81:387e         
                                                      fe80::9472:c1ff:fe70:168f         
                                                      fe80::de2c:6eff:fe8a:990d         
                                                      fe80::de2c:6eff:fe8a:990f         
1 D tv  100.127.1.2                                                                     
2 DO  p 200:127:1::3  200:127:1::1     100.127.1.3:0  200:126:1::3                      
                                                      200:126:2::3                      
                                                      200:127:1::3                      
                                                      fe80::1458:daff:fe81:387e         
                                                      fe80::9472:c1ff:fe70:168f         
                                                      fe80::de2c:6eff:fe7a:d0e6         
                                                      fe80::de2c:6eff:fe7a:d0f6    
                                                      
                                                      
                                                      
#### After reboot 

[zuul@ccr2004-2splus-01.test.lab.ipa] > mpls/ldp/neighbor/print 
Flags: D, I - INACTIVE; O, W, T - THROTTLED; t - SENDING-TARGETED-HELLO; v - VPLS; p - PASSIVE
Columns: TRANSPORT, LOCAL-TRANSPORT, PEER, ADDRESSES
#       TRANSPORT     LOCAL-TRANSPORT  PEER           ADDRESSES                
0 DWtvp 100.127.1.2   100.127.1.1      100.127.1.2:0                           
1 D tv  200:127:1::2                                                           
2 DO  p 200:127:1::3  200:127:1::1     100.127.1.3:0  200:126:1::3             
                                                      200:126:2::3             
                                                      200:127:1::3             
                                                      fe80::1458:daff:fe81:387e
                                                      fe80::9472:c1ff:fe70:168f
                                                      fe80::de2c:6eff:fe7a:d0e6
                                                      fe80::de2c:6eff:fe7a:d0f6

The lab topology is below

Image
 
User avatar
bajodel
Long time Member
Long time Member
Posts: 548
Joined: Sun Nov 24, 2013 8:30 am
Location: Italy

Re: v7.1 MPLS/VPLS with IPv4/IPv6 ldp question

Sat Apr 30, 2022 1:29 pm

I've seen an update about MPLS path selection on che the last changelog, was it linked to this issue ?

Who is online

Users browsing this forum: No registered users and 8 guests