FPM Route Population : Experiments with Trellis Mininet scripts; Some errors still pending.

[Jayakumar Thazhath]

Hi all,

 

Following steps works for me in setting up Trellis Mininet setup.

 

ONOS 2.2

Compiling ONOS

export ONOS_ROOT=`pwd`

. tools/dev/bash_profile

export ONOS_APPS="drivers,openflow,segmentrouting,fpm,dhcprelay, netcfghostprovider,routeradvertisement,mcast,netconf,netcfg"

bazel build onos

bazel run onos-local -- clean

 

Loading Trellis configuration

export ONOS_ROOT=`pwd`

. tools/dev/bash_profile

Note : Change to Trellis mininet checkout folder.

onos-netcfg localhost routing/trellis/trellis.json

onos localhost

 

Trellis starting up

Note :

Modified bgpdr1.conf and bgpdbgp1.conf; peer router Ips of "Internal Quagga" and "External Quagga" are incorrect, please correct to 10.0.1.2 and 10.0.1.1 respectively

Also add option “soft-reconfiguration inbound” for neighbors in bgpdr1.conf and bgpdbgp1.conf.

sudo killall -9 dhclient dhcpd zebra bgpd

sudo mn -c

sudo ./trellis.py --controllers <ONOS-IP>

 

FPM route verification : ONOS, Internal Quagga Router, External Quagga Router

In mininet

External Quagga Router

r1 ip r

r1  telnet localhost bgpd

Note : Will be in BGPD CLI.

show ip bgp neighbors 10.0.1.2 advertised-routes

show ip bgp neighbors 10.0.1.2 received-routes

 

Internal Quagga Router

bgp1 ip r

bgp1 telnet localhost bgpd

show ip bgp neighbors 10.0.1.1 advertised-routes

show ip bgp neighbors 10.0.1.1 received-routes

In ONOS

routes

 

For BGPD runtime configuration updating. Attempting to add new route in External Quagga as well as in Internal Quagga; both failed.

enable

conf terminal

router bgp  65001

network 1.1.1.0/24

write

! Note: write failed; couldn't save configuration due to configuration file related issues.

ERROR : Can't open configuration file ...../routing/trellis/./bgpdr1.conf.urkQVe.

 

But on modifying bgpdr1.conf (added new network at line 34 ); restart Trellis then we can see new routes populated in ONOS.

 

33 network 10.0.99.0/24

34 network 10.75.75.0/24

35 !

 

ubuntu@root > routes

B: Best route, R: Resolved route

 

Table: ipv4

B R  Network            Next Hop        Source (Node)

     0.0.0.0/0          172.16.0.1      FPM (127.0.0.1)

> *  10.0.99.0/24       10.0.1.1        FPM (127.0.0.1)

> *  10.75.75.0/24      10.0.1.1        FPM (127.0.0.1)

   Total: 3

 

Table: ipv6

B R  Network            Next Hop        Source (Node)

   Total: 0

 

 

Help is appreciated in understanding how configuration write restriction can be avoided for Quagga.

 

Thanks & Regards

Jayakumar

 

[Charles Chan]

Hi Jayakumar,

I am not able to reproduce this issue.
I tried to add a new subnet on r1 (external router). bgp1 (Quagga) immediately learnt the route and push to ONOS. ONOS also programed the flow accordingly.

show running-config also has the newly added subnet.
write command also completed successfully.

r1(config-router)# write
Configuration saved to /home/sdn/routing/trellis/./bgpdr1.conf

I noticed your file wrote to a weird path

! Note: write failed; couldn't save configuration due to configuration file related issues.
ERROR : Can't open configuration file ...../routing/trellis/./bgpdr1.conf.urkQVe.

I am guessing that your quagga process doesn't have permission to write to the config file.
Can you share the result of
ps aux | grep zebra
ls -la <bgpdr1.conf absolute path>

Thanks,

Charles Chan, Ph.D.

Member of Technical Staff, Open Networking Foundation

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