Unix virtual interfaces

[RICCARDO RUSSO]

Hello,
I'm running bird 2.0.2 on centOS

I've configured 2 virtual interfaces (eth1:1 and lo:1)

When I run show protocol I don't see them. Are virtual interfaces supported
by bird?
I need it in order to advertise by BGP lo:1

R

---
# ifconfig
eth0: flags=4163  mtu 1500
inet 163.162.230.198  netmask 255.255.255.240  broadcast
163.162.230.207
inet6 fe80::2e:a6ff:fe66:5a27  prefixlen 64  scopeid 0x20
ether 02:2e:a6:66:5a:27  txqueuelen 1000  (Ethernet)
RX packets 14271  bytes 996507 (973.1 KiB)
RX errors 0  dropped 0  overruns 0  frame 0
TX packets 2746  bytes 314846 (307.4 KiB)
TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

eth1: flags=4163  mtu 1500
inet 192.168.200.8  netmask 255.255.255.0  broadcast 192.168.200.255
inet6 fe80::9034:56ff:feee:  prefixlen 64  scopeid 0x20
ether 92:34:56:ee:ee:ee  txqueuelen 1000  (Ethernet)
RX packets 16109  bytes 1066648 (1.0 MiB)
RX errors 0  dropped 0  overruns 0  frame 0
TX packets 7805  bytes 514801 (502.7 KiB)
TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

eth1:1: flags=4163  mtu 1500
inet 10.10.10.10  netmask 255.255.255.255  broadcast 10.255.255.255
ether 92:34:56:ee:ee:ee  txqueuelen 1000  (Ethernet)

lo: flags=73  mtu 65536
inet 127.0.0.1  netmask 255.0.0.0
inet6 ::1  prefixlen 128  scopeid 0x10
loop  txqueuelen 1  (Local Loopback)
RX packets 6  bytes 416 (416.0 B)
RX errors 0  dropped 0  overruns 0  frame 0
TX packets 6  bytes 416 (416.0 B)
TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo:1: flags=73  mtu 65536
inet 163.162.35.89  netmask 255.255.255.255
loop  txqueuelen 1  (Local Loopback)

---
# birdc show interfaces
BIRD 2.0.2 ready.
lo up (index=1)
MultiAccess AdminUp LinkUp Loopback Ignored MTU=65536
127.0.0.1/8 (Preferred, scope host)
163.162.35.89/32 (scope univ)
::1/128 (Preferred, scope host)
eth0 up (index=2)
MultiAccess Broadcast Multicast AdminUp LinkUp MTU=1500
163.162.230.198/28 (Preferred, scope univ)
fe80::2e:a6ff:fe66:5a27/64 (Preferred, scope link)
eth1 up (index=3)
MultiAccess Broadcast Multicast AdminUp LinkUp MTU=1500
192.168.200.8/24 (Preferred, scope site)
10.10.10.10/32 (scope site)
fe80::9034:56ff:feee:/64 (Preferred, scope link)

Rr

Re: BGP import route

[RICCARDO RUSSO]

 Ok. I have installed bird via epel on Centos

The router sending BGP announcement is Juniper Open Contrail Virtual Router
(on Openstack). I downloaded and installed the 2.0.2 and used this config:


-
# more /usr/local/etc/bird.conf
log syslog all;
log stderr all;
log "/var/log/bird.logg" all;
debug protocols all;

protocol kernel {
ipv4 {
 import all;
 export all;
};
persist;
scan time 20;
}

protocol device {
scan time 10;   # Scan interfaces every 10 seconds
}

router id 192.168.200.6;

protocol bgp bgp1 {
   local as 64521;
   neighbor 192.168.200.1 as 64520;
   ipv4 {
  import all;
  export all;
   };
}

-

And finally I see all routes:

-
[root@vm-1 bird-2.0.2]# birdc show route
BIRD 2.0.2 ready.
Table master4:
163.162.35.131/32unicast [bgp1 20:48:36.342] * (100) [AS64520?]
via 192.168.200.1 on eth1
163.162.35.80/32 unicast [bgp1 20:48:36.342] * (100) [AS3269i]
via 192.168.200.1 on eth1
100.64.3.28/32   unicast [bgp1 20:48:36.342] * (100) [AS64520?]
via 192.168.200.1 on eth1
...

-

Rr


2018-04-11 19:21 GMT+02:00 Jan Maria Matějka <jan.mate...@nic.cz>:

> Hello!
>
> First of all, we don't support this old version. Please upgrade, either to
> 1.6.4 or to 2.0.2.
>
> Second, the other side seems to send multiprotocol NLRI to you. BIRD in
> 1.x versions AFAIK does not support this extension and should not announce
> it. What is the remote software?
>
> Writing from my phone with no access to source code, trying to recall it
> from my memory. I might be wrong.
>
> Maria
>
> Quidquid latine dictum sit, altum videtur.
>
> -Original Message-
> From: RICCARDO RUSSO <riccardo.russ...@gmail.com>
> To: bird-users@network.cz
> Sent: Wed, 11 Apr 2018 6:10 PM
> Subject: BGP import route
>
> Hello,
> I'm not able to import route from BGP (CentOS 7). In log file I read "Got
> UPDATE" but  "import updates" is always 0. With TCPDUMP I see that BGP
> receive the routes
>
> Rr
>
> 
> # more bird.conf
> log syslog all;
> log stderr all;
> log "/var/log/bird.logg" all;
> debug protocols all;
>
> protocol kernel {
> persist;# Don't remove routes on bird shutdown
> scan time 20;   # Scan kernel routing table every 20
> seconds
> }
>
> protocol device {
> scan time 10;   # Scan interfaces every 10 seconds
> }
>
> router id 192.168.200.6;
>
> protocol bgp bgp1 {
>local as 64521;
>neighbor 192.168.200.1 as 64520;
>import filter all;
> }
> 
>
>
> 
>
> # tail -f /var/log/bird.logg
> 2018-04-11 17:46:53  kernel1 < interface lo goes up
> 2018-04-11 17:46:53  kernel1 < interface eth0 goes up
> 2018-04-11 17:46:53  kernel1 < interface eth1 goes up
> 2018-04-11 17:46:53  kernel1: State changed to up
> 2018-04-11 17:46:53  bgp1: Started
> 2018-04-11 17:46:53  bgp1: Connect delayed by 5 seconds
> 2018-04-11 17:46:53  kernel1: Scanning routing table
> 2018-04-11 17:46:53  kernel1: 0.0.0.0/0: [alien] ignored
> 2018-04-11 17:46:53  kernel1: 192.168.44.0/24: [alien] ignored
> 2018-04-11 17:46:53  kernel1: Pruning table master
> 2018-04-11 17:46:57  bgp1: Connecting to 192.168.200.1 from local
> address 192.168.200.6
> 2018-04-11 17:46:57  bgp1: Connected
> 2018-04-11 17:46:57  bgp1: Sending
> OPEN(ver=4,as=64521,hold=240,id=c0a8c806)
> 2018-04-11 17:46:57  bgp1: Connection closed
> 2018-04-11 17:46:57  bgp1: Connect delayed by 5 seconds
> 2018-04-11 17:47:03  device1: Scanning interfaces
> 2018-04-11 17:47:03  bgp1: Connecting to 192.168.200.1 from local
> address 192.168.200.6
> 2018-04-11 17:47:03  bgp1: Connected
> 2018-04-11 17:47:03  bgp1: Sending
> OPEN(ver=4,as=64521,hold=240,id=c0a8c806)
> 2018-04-11 17:47:03  bgp1: Got OPEN(as=64520,hold=90,id=a3a2e686)
> 2018-04-11 17:47:03  bgp1: Sending KEEPALIVE
> 2018-04-11 17:47:03  bgp1: Got KEEPALIVE
> 2018-04-11 17:47:03  bgp1: BGP session established
> 2018-04-11 17:47:03  bgp1: Connected to table master
> 2018-04-11 17:47:03  bgp1: State changed t

BGP import route

[RICCARDO RUSSO]

Hello,
I'm not able to import route from BGP (CentOS 7). In log file I read "Got
UPDATE" but  "import updates" is always 0. With TCPDUMP I see that BGP
receive the routes

Rr


# more bird.conf
log syslog all;
log stderr all;
log "/var/log/bird.logg" all;
debug protocols all;

protocol kernel {
persist;# Don't remove routes on bird shutdown
scan time 20;   # Scan kernel routing table every 20 seconds
}

protocol device {
scan time 10;   # Scan interfaces every 10 seconds
}

router id 192.168.200.6;

protocol bgp bgp1 {
   local as 64521;
   neighbor 192.168.200.1 as 64520;
   import filter all;
}





# tail -f /var/log/bird.logg
2018-04-11 17:46:53  kernel1 < interface lo goes up
2018-04-11 17:46:53  kernel1 < interface eth0 goes up
2018-04-11 17:46:53  kernel1 < interface eth1 goes up
2018-04-11 17:46:53  kernel1: State changed to up
2018-04-11 17:46:53  bgp1: Started
2018-04-11 17:46:53  bgp1: Connect delayed by 5 seconds
2018-04-11 17:46:53  kernel1: Scanning routing table
2018-04-11 17:46:53  kernel1: 0.0.0.0/0: [alien] ignored
2018-04-11 17:46:53  kernel1: 192.168.44.0/24: [alien] ignored
2018-04-11 17:46:53  kernel1: Pruning table master
2018-04-11 17:46:57  bgp1: Connecting to 192.168.200.1 from local
address 192.168.200.6
2018-04-11 17:46:57  bgp1: Connected
2018-04-11 17:46:57  bgp1: Sending
OPEN(ver=4,as=64521,hold=240,id=c0a8c806)
2018-04-11 17:46:57  bgp1: Connection closed
2018-04-11 17:46:57  bgp1: Connect delayed by 5 seconds
2018-04-11 17:47:03  device1: Scanning interfaces
2018-04-11 17:47:03  bgp1: Connecting to 192.168.200.1 from local
address 192.168.200.6
2018-04-11 17:47:03  bgp1: Connected
2018-04-11 17:47:03  bgp1: Sending
OPEN(ver=4,as=64521,hold=240,id=c0a8c806)
2018-04-11 17:47:03  bgp1: Got OPEN(as=64520,hold=90,id=a3a2e686)
2018-04-11 17:47:03  bgp1: Sending KEEPALIVE
2018-04-11 17:47:03  bgp1: Got KEEPALIVE
2018-04-11 17:47:03  bgp1: BGP session established
2018-04-11 17:47:03  bgp1: Connected to table master
2018-04-11 17:47:03  bgp1: State changed to feed
2018-04-11 17:47:03  bgp1: State changed to up
2018-04-11 17:47:03  bgp1: Sending End-of-RIB
2018-04-11 17:47:03  bgp1: Got UPDATE
2018-04-11 17:47:03  bgp1: Got UPDATE
2018-04-11 17:47:03  bgp1: Got UPDATE
2018-04-11 17:47:03  bgp1: Got UPDATE
2018-04-11 17:47:03  bgp1: Got UPDATE
2018-04-11 17:47:03  ...





# birdc show protocols all bgp1
BIRD 1.4.5 ready.
name prototablestate  since   info
bgp1 BGP  master   up 17:47:03Established
  Preference: 100
  Input filter:   ACCEPT
  Output filter:  REJECT
  Routes: 0 imported, 0 exported, 0 preferred
  Route change stats: received   rejected   filteredignored
 accepted
Import updates:  0  0  0  0
  0
Import withdraws:0  0---  0
  0
Export updates:  0  0  0---
  0
Export withdraws:0---------
  0
  BGP state:  Established
Neighbor address: 192.168.200.1
Neighbor AS:  64520
Neighbor ID:  163.162.230.134
Neighbor caps:restart-aware
Session:  external
Source address:   192.168.200.6
Hold timer:   62/90
Keepalive timer:  22/30




# tcpdump -i eth1 tcp port 179 -vvv -XX
17:37:51.260061 IP (tos 0x0, ttl 1, id 49246, offset 0, flags [DF], proto
TCP (6), length 1353)
192.168.200.1.bgp > vm-1.59873: Flags [P.], cksum 0xad25 (correct), seq
61:1362, ack 69, win 210, options [nop,nop,TS val 1643220008 ecr 25496328],
length 1301: BGP
Update Message (2), length: 66
  Origin (1), length: 1, Flags [T]: Incomplete
0x:  02
  Next Hop (3), length: 4, Flags [T]: 192.168.200.1
0x:  c0a8 c801
  Multi Exit Discriminator (4), length: 4, Flags [O]: 100
0x:   0064
  AS Path (2), length: 4, Flags [T]: 64520
0x:  0201 fc08
  Multi-Protocol Reach NLRI (14), length: 14, Flags [OE]:
AFI: IPv4 (1), SAFI: Unicast (1)
nexthop: 192.168.200.1, nh-length: 4, no SNPA
  163.162.230.199/32
0x:  0001 0104 c0a8 c801 0020 a3a2 e6c7