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Manual:MLPPP over single and multiple links

www.basic-mikrotik.blogspot.com on 11.10. -

Summary

Multi-Link Point to Point Protocol (Multi-Link PPP or MLPPP) is a method of splitting, recombining, and sequencing data across multiple logical data links.

Large packets are actually split into bits and sent evenly down ALL logical data links. This is done instantaneously with NO loss of bandwidth. It is important to understand that other end of the link needs to use the same protocol to recombine your data.

MLPPP over single link

To enable Multi-link PPP over single link you must specify MRRU (Maximum Receive Reconstructed Unit) option. If both sides support this feature there are no need for MSS adjustment (in firewall mangle). Study shows that MRRU is less CPU expensive that 2 mangle rules per client. MRRU allows to divide packet to multiple channels therefore increasing possible MTU and MRU (up to 65535 bytes)

Under Windows it can be enabled in Networking tag, Settings button, "Negotiate multi-link for single link connections". Their MRRU is hard coded to 1614.

Configuration Example

In short - standard PPP link - just specify MRRU in both sides :)

MLPPP over multiple links

MLPPP over multiple links allow to create a single ppp link over multiple physical connections. All PPP links must come from the same server (server must have MLPPP over multiple links support) and all PPP links must have same user name and password.

And to enable MLPPP you just need to create PPP client and specify multiple interfaces instead of single interface. Mikrotik RouterOS have MLPPP clent support starting from version 3.10. Presently there are no MLPPP server support available.


Manual:TE Tunnels Example

www.basic-mikrotik.blogspot.com on 10.59. -

Introduction

Application example

Consider following setup:


IP Connectivity and LDP


R1

ether1 connects to R2, ether2 connects to R5

/system identity set name=R1
/interface bridge add name=lo0

/ip address
add address=192.168.55.1/30 interface=ether1
add address=192.168.55.18/30 interface=ether2
add address=10.255.1.1/32 interface=lo0 

/routing ospf instance 
set default router-id=10.255.1.1

/routing ospf network
add network=192.168.55.0/24 area=backbone
add network=10.255.1.0/24 area=backbone

/mpls ldp 
set enabled=yes lsr-id=10.255.1.1 transport-address=10.255.1.1

/mpls ldp interface
add interface=ether1
add interface=ether2


R2

ether1 connects to R1, ether2 connects to R3

/system identity set name=R2
/interface bridge add name=lo0
/ip address
add address=192.168.55.2/30 interface=ether1
add address=192.168.55.5/30 interface=ether2
add address=10.255.1.2/32 interface=lo0
/routing ospf instance 
set default router-id=10.255.1.2
/routing ospf network
add network=192.168.55.0/24 area=backbone
add network=10.255.1.0/24 area=backbone
/mpls ldp 
set enabled=yes lsr-id=10.255.1.2 transport-address=10.255.1.2
/mpls ldp interface
add interface=ether1
add interface=ether2


R3

ether1 connects to R2, ether2 connects to R4

/system identity set name=R3
/interface bridge add name=lo0
/ip address
add address=192.168.55.6/30 interface=ether1
add address=192.168.55.9/30 interface=ether2
add address=10.255.1.3/32 interface=lo0
/routing ospf instance 
set default router-id=10.255.1.3
/routing ospf network
add network=192.168.55.0/24 area=backbone
add network=10.255.1.0/24 area=backbone
/mpls ldp 
set enabled=yes lsr-id=10.255.1.3 transport-address=10.255.1.3
/mpls ldp interface
add interface=ether1
add interface=ether2


R4

ether1 connects to R3, ether2 connects to R5

/system identity set name=R4
/interface bridge add name=lo0
/ip address
add address=192.168.55.10/30 interface=ether1
add address=192.168.55.13/30 interface=ether2
add address=10.255.1.4/32 interface=lo0
/routing ospf instance 
set default router-id=10.255.1.4
/routing ospf network
add network=192.168.55.0/24 area=backbone
add network=10.255.1.0/24 area=backbone
/mpls ldp 
set enabled=yes lsr-id=10.255.1.4 transport-address=10.255.1.4
/mpls ldp interface
add interface=ether1
add interface=ether2


R5

ether1 connects to R4, ether2 connects to R1

/system identity set name=R5
/interface bridge add name=lo0
/ip address
add address=192.168.55.14/30 interface=ether1
add address=192.168.55.17/30 interface=ether2
add address=10.255.1.5/32 interface=lo0
/routing ospf instance 
set default router-id=10.255.1.5
/routing ospf network
add network=192.168.55.0/24 area=backbone
add network=10.255.1.0/24 area=backbone
/mpls ldp 
set enabled=yes lsr-id=10.255.1.5 transport-address=10.255.1.5
/mpls ldp interface
add interface=ether1
add interface=ether2

After OSPF and LDP setup ensure that ospf is working properly

[admin@R1] /routing ospf neighbor> print 
 0 instance=default router-id=10.255.1.5 address=192.168.55.17 interface=ether2 
   priority=1 dr-address=192.168.55.17 backup-dr-address=192.168.55.18 
   state="Full" state-changes=5 ls-retransmits=0 ls-requests=0 db-summaries=0 
   adjacency=32m17s 
 1 instance=default router-id=10.255.1.2 address=192.168.55.2 interface=ether1 
   priority=1 dr-address=192.168.55.2 backup-dr-address=192.168.55.1 
   state="Full" state-changes=5 ls-retransmits=0 ls-requests=0 db-summaries=0 
   adjacency=32m17s 
[admin@R1] /routing ospf neighbor>   
[admin@R1] /ip route> print 
Flags: X - disabled, A - active, D - dynamic, 
C - connect, S - static, r - rip, b - bgp, o - ospf, m - mme, 
B - blackhole, U - unreachable, P - prohibit 
 #      DST-ADDRESS        PREF-SRC        GATEWAY            DISTANCE
 0 ADS  0.0.0.0/0                          10.1.101.1         0       
 1 ADC  10.1.101.0/24      10.1.101.9      ether3             0       
 2 ADC  10.255.1.1/32      10.255.1.1      lo0                0       
 3 ADo  10.255.1.2/32                      192.168.55.2       110     
 4 ADo  10.255.1.3/32                      192.168.55.2       110     
 5 ADo  10.255.1.4/32                      192.168.55.17      110     
 6 ADo  10.255.1.5/32                      192.168.55.17      110     
 7 ADC  192.168.55.0/30    192.168.55.1    ether1             0       
 8 ADo  192.168.55.4/30                    192.168.55.2       110     
 9 ADo  192.168.55.8/30                    192.168.55.2       110     
                                           192.168.55.17     
10 ADo  192.168.55.12/30                   192.168.55.17      110     
11 ADC  192.168.55.16/30   192.168.55.18   ether2             0       
[admin@R1] /ip route>

Also make sure MPLS forwarding-table has label bindings

[admin@R1] /mpls forwarding-table> print 
Flags: L - ldp, V - vpls, T - traffic-eng 
 #   IN-LABEL      OUT-LABELS  DESTINATION                    I NEXTHOP        
 0   expl-null    
 1 L 16                        10.255.1.5/32                  e 192.168.55.17  
 2 L 17            19          192.168.55.8/30                e 192.168.55.2   
 3 L 18            19          10.255.1.4/32                  e 192.168.55.17  
 4 L 19            21          10.255.1.3/32                  e 192.168.55.2   
 5 L 20                        192.168.55.12/30               e 192.168.55.17  
 6 L 21                        192.168.55.4/30                e 192.168.55.2   
 7 L 22                        10.255.1.2/32                  e 192.168.55.2

VPLS tunnel

ether4 goes to CE routers

R1

/interface bridge add name=vpn
/interface vpls 
add remote-peer=10.255.1.3 vpls-id=3:3
/interface bridge port
add interface=ether4 bridge=vpn
add interface=vpls1 bridge=vpn

R3

/interface bridge add name=vpn
/interface vpls 
add remote-peer=10.255.1.1 vpls-id=3:3
/interface bridge port
add interface=ether4 bridge=vpn
add interface=vpls1 bridge=vpn

Make sure that VPLS tunnel is established and running

[admin@R1] /interface vpls> monitor 0 once 
       remote-label: 23
        local-label: 23
      remote-status: 
          transport: 10.255.1.3/32
  transport-nexthop: 192.168.55.2
     imposed-labels: 21,23
[admin@R1] /interface vpls>

TE Support

Traffic engineering needs RSVP protocol enabled on head end, tail end and forwarding routers. And additional setup to use CSPF.

In our example all routers have the same configuration:

# set up CSPF
/routing ospf instance
set default mpls-te-area=backbone mpls-te-router-id=lo0

# add interfaces on which to run RSVP
/mpls traffic-eng interface
add interface=ether1 bandwidth=10Mbps
add interface=ether2 bandwidth=10Mbps