Xen networking on PowerEdge 1950

Dirk Allaert dirk.allaert at barclab.com
Wed Jul 5 08:16:01 CDT 2006 

We installed FC5 on a new PowerEdge 1950. Network works until xend is 
started. After starting xend network does not work anymore. Before 
starting xend, network is also way too slow. The speed of an scp copy is 
only 900KB/s (both with xen0 kernel and with regular kernel).

I have not found any errors in the logs. We do get 2 audit lines on the 
console when starting xend (which we do not get on or 2 other Xen 
servers). From the console we can still ping to the server's own ip 
address but nothing else.

regards, Dirk

(xend service not yet started)
[root at xen3 ~]# ip a
1: lo: <LOOPBACK,UP,10000> 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
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: vif0.0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
3: veth0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
4: vif0.1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
5: veth1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
6: vif0.2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
7: veth2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
8: vif0.3: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
9: veth3: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
10: vif0.4: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
11: veth4: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
12: vif0.5: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
13: veth5: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
14: vif0.6: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
15: veth6: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
16: vif0.7: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
17: veth7: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
18: eth0: <BROADCAST,MULTICAST,UP,10000> mtu 1500 qdisc pfifo_fast qlen 1000
    link/ether 00:13:72:f7:af:a5 brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.108/23 brd 192.168.1.255 scope global eth0
    inet6 fe80::213:72ff:fef7:afa5/64 scope link
       valid_lft forever preferred_lft forever
19: sit0: <NOARP> mtu 1480 qdisc noop
    link/sit 0.0.0.0 brd 0.0.0.0
[root at xen3 ~]# ping 192.168.1.1
PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.
64 bytes from 192.168.1.1: icmp_seq=1 ttl=64 time=1.56 ms

--- 192.168.1.1 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 1.565/1.565/1.565/0.000 ms

[root at xen3 ~]# service xend start
tarting xend: Bridge firewalling registered
audit(1152099712.232:3): dev=vif0.0 prom=256 old_prom=0 auid=4294967295
audit(1152099715.496:4): dev=peth0 prom=256 old_prom=0 auid=4294967295
                                                           [  OK  ]
[root at xen3 ~]# ping 192.168.1.1
PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.
 From 192.168.1.108 icmp_seq=1 Destination Host Unreachable
 From 192.168.1.108 icmp_seq=2 Destination Host Unreachable
 From 192.168.1.108 icmp_seq=3 Destination Host Unreachable

--- 192.168.1.1 ping statistics ---
4 packets transmitted, 0 received, +3 errors, 100% packet loss, time 3007ms
, pipe 3
[root at xen3 ~]# ip a
1: lo: <LOOPBACK,UP,10000> 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
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: vif0.0: <BROADCAST,MULTICAST,UP,10000> mtu 1500 qdisc noqueue
    link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
    inet6 fe80::fcff:ffff:feff:ffff/64 scope link
       valid_lft forever preferred_lft forever
3: eth0: <BROADCAST,MULTICAST,UP,10000> mtu 1500 qdisc noqueue
    link/ether 00:13:72:f7:af:a5 brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.108/23 brd 192.168.1.255 scope global eth0
    inet6 fe80::213:72ff:fef7:afa5/64 scope link
       valid_lft forever preferred_lft forever
4: vif0.1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
5: veth1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
6: vif0.2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
7: veth2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
8: vif0.3: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
9: veth3: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
10: vif0.4: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
11: veth4: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
12: vif0.5: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
13: veth5: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
14: vif0.6: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
15: veth6: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
16: vif0.7: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
17: veth7: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
18: peth0: <BROADCAST,MULTICAST,NOARP,UP,10000> mtu 1500 qdisc 
pfifo_fast qlen 1000
    link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
    inet6 fe80::fcff:ffff:feff:ffff/64 scope link
       valid_lft forever preferred_lft forever
19: sit0: <NOARP> mtu 1480 qdisc noop
    link/sit 0.0.0.0 brd 0.0.0.0
20: xenbr0: <BROADCAST,MULTICAST,UP,10000> mtu 1500 qdisc noqueue
    link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
    inet6 fe80::200:ff:fe00:0/64 scope link
       valid_lft forever preferred_lft forever
[root at xen3 ~]# brctl show
bridge name    bridge id        STP enabled    interfaces
xenbr0        8000.feffffffffff    no        peth0
                            vif0.0

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