Toon posts:

xen network troubles

Pagina: 1
Acties:

vrijdag 28 oktober 2005 19:15

Acties:
  • morphje
  • Registratie: Juni 2001
  • Laatst online: 09-01 15:38

morphje

let's all love lain

Topicstarter
Ik ben hier een tijdje bezig met xen. Echter wilde ik een 2tal netwerkkaarten aan m'n virtual machines vastmaken. Ik ga gelijk over op xen termen. Aangezien het mogelijk een xen gerelateerd probleem is. Indien het gewoon een netwerkprobleem is kan je de xen termen skippen en een oplossing geven voor het netwerkprobleem :)

Het probleem is kortweg: ik kan met een enkele vif op een domU wel contact van een externe machine krijgen met de domU, maar zodra ik een 2e vif toeken aan de domU met een extra bridge in m'n dom0 krijg ik geen extern contact meer met de domU

publieke adressen zijn gemaskeerd omdat ik geen zin heb om mijn externe adressen op het internet te smijten. Vergeet ook niet dat ik al enkele dagen hier mee aan stoeien ben en ik kan geen verschil meer vinden tussen de getallen. Misschien dat iemand een heel erg opvallend iets ziet wat ik niet meer zie.

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----------------------------------------------------------------------
De opzet:
----------------------------------------------------------------------

  ---------                                      
  | winxp |                                       
  ---------                                       
      |       /------ dom0 name  : atlas
             /             eth0  : 192.168.0.180   
      |     /              dummy0: x.x.123.4    
  ---------/                                       
  | atlas | 
  |  xen  | \                                      
  ---------  ------- domU  name  : baseinstall     
                           eth0  : x.x.123.9    
                           eth1  : 192.168.0.181   
                                                   

----------------------------------------------------------------------
alle informatie die ik kan vinden op dom0 met een enkele vif
----------------------------------------------------------------------

atlas:~# ip route
x.x.123.0/26 dev dummy0  proto kernel  scope link  src x.x.123.4
192.168.0.0/24 dev xen-br0  proto kernel  scope link  src 192.168.0.180
default via 192.168.0.50 dev xen-br0

atlas:~# ip addr
1: lo: <LOOPBACK,UP> mtu 16436 qdisc noqueue
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
2: dummy0: <BROADCAST,NOARP,UP> mtu 1500 qdisc noqueue
    link/ether 9e:59:f0:3c:81:8f brd ff:ff:ff:ff:ff:ff
    inet x.x.123.4/26 brd x.x.123.63 scope global dummy0
3: eth0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast qlen 1000
    link/ether 00:50:bf:d6:57:38 brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.180/24 brd 192.168.0.255 scope global eth0
4: xen-br0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue
    link/ether 00:50:bf:d6:57:38 brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.180/32 brd 192.168.0.255 scope global xen-br0
5: vif1.0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue
    link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff

atlas:~# brctl show
bridge name     bridge id               STP enabled     interfaces
xen-br0         8000.0050bfd65738       no              eth0
                                                        vif1.0

atlas:~# route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
x.x.123.0    0.0.0.0         255.255.255.192 U     0      0        0 dummy0
192.168.0.0     0.0.0.0         255.255.255.0   U     0      0        0 xen-br0
0.0.0.0         192.168.0.50    0.0.0.0         UG    0      0        0 xen-br0

atlas:~# brctl showmacs xen-br0
port no mac addr                is local?       ageing timer
  1     00:0b:6a:ad:02:c7       no               128.44
  1     00:0c:76:56:b4:c7       no               162.03
  1     00:0e:50:3d:9d:17       no               185.88
  1     00:0e:a6:23:b9:ad       no                 0.00
  1     00:0e:a6:23:d4:4f       no               138.53
  1     00:10:60:38:81:fc       no                38.61
  1     00:50:bf:d6:57:38       yes                0.00
  2     aa:00:00:45:f7:1b       no               185.88
  2     fe:ff:ff:ff:ff:ff       yes                0.00

atlas:~# ifconfig
dummy0    Link encap:Ethernet  HWaddr 9E:59:F0:3C:81:8F
          inet addr:x.x.123.4  Bcast:x.x.123.63  Mask:255.255.255.192
          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

eth0      Link encap:Ethernet  HWaddr 00:50:BF:D6:57:38
          inet addr:192.168.0.180  Bcast:192.168.0.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:356 errors:0 dropped:0 overruns:0 frame:0
          TX packets:437 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:38274 (37.3 KiB)  TX bytes:41424 (40.4 KiB)
          Interrupt:9 Base address:0xa400

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:684 errors:0 dropped:0 overruns:0 frame:0
          TX packets:684 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:39203 (38.2 KiB)  TX bytes:39203 (38.2 KiB)

vif1.0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:26 errors:0 dropped:0 overruns:0 frame:0
          TX packets:54 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:3567 (3.4 KiB)  TX bytes:5964 (5.8 KiB)

xen-br0   Link encap:Ethernet  HWaddr 00:50:BF:D6:57:38
          inet addr:192.168.0.180  Bcast:192.168.0.255  Mask:255.255.255.255
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:325 errors:0 dropped:0 overruns:0 frame:0
          TX packets:403 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:29849 (29.1 KiB)  TX bytes:35669 (34.8 KiB)


atlas:~# ip maddr
2:      dummy0
        link  01:00:5e:00:00:01
3:      eth0
        link  01:00:5e:00:00:01
4:      xen-br0
        link  01:00:5e:00:00:01


----------------------------------------------------------------------
alle informatie die ik kan vinden op dom0 met 2 vif&#8217;s per domU
----------------------------------------------------------------------
dit is mijn aangepaste config van m'n domU

# Number of network interfaces. Default is 1.
nics=2

# Optionally define mac and/or bridge for the network interfaces.
# Random MACs are assigned if not given.
vif = ['bridge=xen-loc', 'bridge=xen-br0' ]

atlas:~# ip route
x.x.123.0/26 dev xen-loc  proto kernel  scope link  src x.x.123.4
192.168.0.0/24 dev xen-br0  proto kernel  scope link  src 192.168.0.180
default via 192.168.0.50 dev xen-br0

atlas:~# ip addr
1: lo: <LOOPBACK,UP> mtu 16436 qdisc noqueue
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
2: dummy0: <BROADCAST,NOARP,UP> mtu 1500 qdisc noqueue
    link/ether 3e:8a:bf:84:29:10 brd ff:ff:ff:ff:ff:ff
    inet x.x.123.4/26 brd x.x.123.63 scope global dummy0
3: eth0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast qlen 1000
    link/ether 00:50:bf:d6:57:38 brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.180/24 brd 192.168.0.255 scope global eth0
4: xen-br0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue
    link/ether 00:50:bf:d6:57:38 brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.180/32 brd 192.168.0.255 scope global xen-br0
5: xen-loc: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue
    link/ether 3e:8a:bf:84:29:10 brd ff:ff:ff:ff:ff:ff
    inet x.x.123.4/32 brd x.x.123.63 scope global xen-loc
6: vif1.0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue
    link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
7: vif1.1: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue
    link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff

atlas:~# brctl show
bridge name     bridge id               STP enabled     interfaces
xen-br0         8000.0050bfd65738       no              eth0
                                                        vif1.1
xen-loc         8000.3e8abf842910       no              dummy0
                                                        vif1.0

atlas:~# route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
x.x.123.0    0.0.0.0         255.255.255.192 U     0      0        0 xen-loc
192.168.0.0     0.0.0.0         255.255.255.0   U     0      0        0 xen-br0
0.0.0.0         192.168.0.50    0.0.0.0         UG    0      0        0 xen-br0

atlas:~# brctl showmacs xen-br0
port no mac addr                is local?       ageing timer
  1     00:0e:50:3d:9d:17       no                87.86
  1     00:0e:a6:23:b9:ad       no                 0.00
  1     00:0e:a6:23:d4:4f       no               112.76
  1     00:50:bf:d6:57:38       yes                0.00
  2     aa:00:00:64:e1:d7       no               108.50
  2     fe:ff:ff:ff:ff:ff       yes                0.00

atlas:~# brctl showmacs xen-loc
port no mac addr                is local?       ageing timer
  1     3e:8a:bf:84:29:10       yes                0.00
  2     aa:00:00:64:e1:d7       no                78.24
  2     fe:ff:ff:ff:ff:ff       yes                0.00


atlas:~# ifconfig
dummy0    Link encap:Ethernet  HWaddr 3E:8A:BF:84:29:10
          inet addr:x.x.123.4  Bcast:x.x.123.63  Mask:255.255.255.192
          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:42 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 b)  TX bytes:1876 (1.8 KiB)

eth0      Link encap:Ethernet  HWaddr 00:50:BF:D6:57:38
          inet addr:192.168.0.180  Bcast:192.168.0.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:159 errors:0 dropped:0 overruns:0 frame:0
          TX packets:207 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:16966 (16.5 KiB)  TX bytes:19507 (19.0 KiB)
          Interrupt:9 Base address:0xa400

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:828 errors:0 dropped:0 overruns:0 frame:0
          TX packets:828 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:47336 (46.2 KiB)  TX bytes:47336 (46.2 KiB)

vif1.0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:42 errors:0 dropped:0 overruns:0 frame:0
          TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:1876 (1.8 KiB)  TX bytes:280 (280.0 b)

vif1.1    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:3 errors:0 dropped:0 overruns:0 frame:0
          TX packets:6 errors:0 dropped:1 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:182 (182.0 b)  TX bytes:326 (326.0 b)

xen-br0   Link encap:Ethernet  HWaddr 00:50:BF:D6:57:38
          inet addr:192.168.0.180  Bcast:192.168.0.255  Mask:255.255.255.255
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:149 errors:0 dropped:0 overruns:0 frame:0
          TX packets:199 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:13668 (13.3 KiB)  TX bytes:18129 (17.7 KiB)

xen-loc   Link encap:Ethernet  HWaddr 3E:8A:BF:84:29:10
          inet addr:x.x.123.4  Bcast:x.x.123.63  Mask:255.255.255.255
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:42 errors:0 dropped:0 overruns:0 frame:0
          TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:1288 (1.2 KiB)  TX bytes:280 (280.0 b)

atlas:~# ip maddr
2:      dummy0
        link  01:00:5e:00:00:01
3:      eth0
        link  01:00:5e:00:00:01
4:      xen-br0
        link  01:00:5e:00:00:01
5:      xen-loc
        link  01:00:5e:00:00:01

----------------------------------------------------------------------
De TCPdumps met een dubbele vif op alle relevante interfaces
----------------------------------------------------------------------

running ping 192.168.0.181 from external box (winxp)

atlas:~# tcpdump 'icmp or arp' -n -i eth0
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 96 bytes
18:48:28.875891 arp who-has 192.168.0.181 tell 192.168.0.52
18:48:28.877460 arp reply 192.168.0.181 is-at aa:00:00:64:e1:d7
18:48:28.877506 IP 192.168.0.52 > 192.168.0.181: icmp 40: echo request seq 22272
18:48:34.117703 IP 192.168.0.52 > 192.168.0.181: icmp 40: echo request seq 22528
18:48:34.117955 arp who-has 192.168.0.52 tell 192.168.0.181
18:48:34.118032 arp reply 192.168.0.52 is-at 00:0e:a6:23:b9:ad
18:48:39.586215 IP 192.168.0.52 > 192.168.0.181: icmp 40: echo request seq 22784
18:48:45.039124 IP 192.168.0.52 > 192.168.0.181: icmp 40: echo request seq 23040


atlas:~# tcpdump 'icmp or arp' -n -i xen-br0
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on xen-br0, link-type EN10MB (Ethernet), capture size 96 bytes
18:49:41.755115 IP 192.168.0.52 > 192.168.0.181: icmp 40: echo request seq 23296
18:49:41.755388 IP 192.168.0.181 > 192.168.0.52: icmp 40: echo reply seq 23296
18:49:44.308907 arp who-has 192.168.0.50 tell 192.168.0.53
18:49:46.754424 arp who-has 192.168.0.52 tell 192.168.0.181
18:49:46.754548 arp reply 192.168.0.52 is-at 00:0e:a6:23:b9:ad
18:49:47.005364 IP 192.168.0.52 > 192.168.0.181: icmp 40: echo request seq 23552
18:49:47.005502 IP 192.168.0.181 > 192.168.0.52: icmp 40: echo reply seq 23552
18:49:52.442648 IP 192.168.0.52 > 192.168.0.181: icmp 40: echo request seq 23808
18:49:52.442881 IP 192.168.0.181 > 192.168.0.52: icmp 40: echo reply seq 23808
18:49:57.911188 IP 192.168.0.52 > 192.168.0.181: icmp 40: echo request seq 24064
18:49:57.911416 IP 192.168.0.181 > 192.168.0.52: icmp 40: echo reply seq 24064
18:50:01.313560 arp who-has 192.168.0.29 tell 192.168.0.29


tcpdump: WARNING: vif1.1: no IPv4 address assigned
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on vif1.1, link-type EN10MB (Ethernet), capture size 96 bytes
18:50:32.891190 IP 192.168.0.52 > 192.168.0.181: icmp 40: echo request seq 24576
18:50:32.891465 IP 192.168.0.181 > 192.168.0.52: icmp 40: echo reply seq 24576
18:50:38.222152 IP 192.168.0.52 > 192.168.0.181: icmp 40: echo request seq 24832
18:50:38.222344 IP 192.168.0.181 > 192.168.0.52: icmp 40: echo reply seq 24832
18:50:43.721882 IP 192.168.0.52 > 192.168.0.181: icmp 40: echo request seq 25088
18:50:43.722039 IP 192.168.0.181 > 192.168.0.52: icmp 40: echo reply seq 25088
18:50:49.174790 IP 192.168.0.52 > 192.168.0.181: icmp 40: echo request seq 25344
18:50:49.174960 IP 192.168.0.181 > 192.168.0.52: icmp 40: echo reply seq 25344

vrijdag 28 oktober 2005 19:23

Acties:
  • morphje
  • Registratie: Juni 2001
  • Laatst online: 09-01 15:38

morphje

let's all love lain

Topicstarter
Was ik bijna vergeten. De tcpdump laat 1 duidelijk ding zien.

Verkeer komt binnen, gaat naar de bridge en vervolgens naar de vif.
De virtuele machine pakt het op en antwoord
De icmp echo request word netjes beantwoord en gaat via de vif naar de bridge
_alleen_ de eth0 pakt het niet op.

Het communicatie probleem ligt dus duidelijk in de bridge -> eth0, maar geen flauw idee hoe ik dat ga oplossen.

en dit is mijn aangepaste netwerkscript
het bestaande script is gekopieerd naar network.xen

De manier waarop ik het heb gedaan heb ik gekopieerd van:
http://julien.danjou.info/xen.html

code:
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atlas:~# cat /etc/xen/scripts/network
#!/bin/sh
set -e

OP=$1
shift

script=/etc/xen/scripts/network.xen

case ${OP} in
  start)
        $script start bridge=xen-br0 netdev=eth0
        $script start bridge=xen-loc netdev=dummy0
        ;;
  stop)
        $script start bridge=xen-br0 netdev=eth0
        $script start bridge=xen-loc netdev=dummy0
        ;;
  *)
        echo 'Unknown command: ' ${OP}
        echo 'Valid commands are: start, stop'
        exit 1
esac

[ Voor 47% gewijzigd door morphje op 28-10-2005 19:25 ]

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