OSPF HELLO wrong mask
Slawa Olhovchenkov
slw at zxy.spb.ru
Wed May 15 18:33:08 CEST 2013
On Wed, May 15, 2013 at 06:57:11PM +0200, Ondrej Zajicek wrote:
> On Wed, May 15, 2013 at 08:06:07PM +0400, Slawa Olhovchenkov wrote:
> > BIRD 1.3.9 running on FreeBSD 9.1 with next interfaces (not all showed):
> >
> > em0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
> > options=4219b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4,WOL_MAGIC,VLAN_HWTSO>
> > ether 68:05:ca:0e:d3:e1
> > inet 10.254.0.2 netmask 0xffff0000 broadcast 10.254.255.255
> ...
> > Bird send HELLO packet with wrong mask (and Designated Router also):
> >
> > tcpdump: listening on em0, link-type EN10MB (Ethernet), capture size 65535 bytes
> > 20:04:06.186362 IP (tos 0xc0, ttl 1, id 29198, offset 0, flags [none], proto OSPF (89), length 64)
> > 10.254.0.2 > 224.0.0.5: OSPFv2, Hello, length 44
> > Router-ID 185.17.0.1, Backbone Area, Authentication Type: none (0)
> > Options [External]
> > Hello Timer 10s, Dead Timer 40s, Mask 255.255.255.240, Priority 1
> > Designated Router 10.90.90.1
>
> Interesting
> What 'show interfaces' and 'show ospf interface' return?
> And also 'show status' for router id.
ifconfig em0 (full)
em0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
options=4219b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4,WOL_MAGIC,VLAN_HWTSO>
ether 68:05:ca:0e:d3:e1
inet 10.254.0.2 netmask 0xffff0000 broadcast 10.254.255.255
inet6 fe80::6a05:caff:fe0e:d3e1%em0 prefixlen 64 scopeid 0x1
inet 185.17.0.1 netmask 0xffffff00 broadcast 185.17.0.255
inet 185.17.1.1 netmask 0xffffff00 broadcast 185.17.1.255
inet6 2a03:e2c0:0:1::1 prefixlen 64
inet 185.17.2.1 netmask 0xffffff00 broadcast 185.17.2.255
inet 185.17.3.1 netmask 0xffffff00 broadcast 185.17.3.255
inet 10.90.90.1 netmask 0xfffffff0 broadcast 10.90.90.15
inet 193.93.192.1 netmask 0xfffffc00 broadcast 193.93.195.255
nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
media: Ethernet autoselect (1000baseT <full-duplex>)
status: active
BIRD 1.3.9
Router ID is 185.17.0.1
Current server time is 15-05-2013 20:31:09
Last reboot on 16-03-2013 15:38:06
Last reconfiguration on 15-05-2013 19:59:30
Daemon is up and running
em0 up (index=1)
MultiAccess Broadcast Multicast AdminUp LinkUp MTU=1500
10.90.90.1/28 (Primary, scope site)
10.254.0.2/16 (Unselected, scope site)
185.17.0.1/24 (Unselected, scope univ)
185.17.1.1/24 (Unselected, scope univ)
185.17.2.1/24 (Unselected, scope univ)
185.17.3.1/24 (Unselected, scope univ)
193.93.192.1/22 (Unselected, scope univ)
usbus0 DOWN (index=2)
MultiAccess AdminUp LinkUp MTU=0
re0 DOWN (index=3)
MultiAccess Broadcast Multicast AdminUp LinkUp MTU=1500
usbus1 DOWN (index=4)
MultiAccess AdminUp LinkUp MTU=0
usbus2 DOWN (index=5)
MultiAccess AdminUp LinkUp MTU=0
usbus3 DOWN (index=6)
MultiAccess AdminUp LinkUp MTU=0
usbus4 DOWN (index=7)
MultiAccess AdminUp LinkUp MTU=0
usbus5 DOWN (index=8)
MultiAccess AdminUp LinkUp MTU=0
usbus6 DOWN (index=9)
MultiAccess AdminUp LinkUp MTU=0
usbus7 DOWN (index=10)
MultiAccess AdminUp LinkUp MTU=0
ipfw0 DOWN (index=11)
MultiAccess AdminUp LinkUp MTU=65536
lo0 up (index=12)
MultiAccess AdminUp LinkUp Loopback Ignored MTU=16384
127.0.0.1/8 (Primary, scope host)
vlan1 up (index=14)
MultiAccess Broadcast Multicast AdminUp LinkUp MTU=1500
10.90.90.91/29 (Primary, scope site)
vlan3 up (index=15)
MultiAccess Broadcast Multicast AdminUp LinkUp MTU=1500
217.150.63.41/30 (Primary, opposite 217.150.63.42, scope univ)
vlan4 up (index=13)
MultiAccess Broadcast Multicast AdminUp LinkUp MTU=1500
46.231.213.162/30 (Primary, opposite 46.231.213.161, scope univ)
ospf1:
Interface em0 (10.90.90.0/28)
Type: broadcast
Area: 0.0.0.0 (0)
State: dr
Priority: 1
Cost: 10
Hello timer: 10
Wait timer: 40
Dead timer: 40
Retransmit timer: 5
Designed router (ID): 185.17.0.1
Designed router (IP): 10.90.90.1
Backup designed router (ID): 0.0.0.0
Backup designed router (IP): 0.0.0.0
Interface em0 (10.254.0.0/16)
Type: broadcast
Area: 0.0.0.0 (0)
State: waiting (stub)
Priority: 1
Cost: 10
Hello timer: 10
Wait timer: 40
Dead timer: 40
Retransmit timer: 5
Designed router (ID): 0.0.0.0
Designed router (IP): 0.0.0.0
Backup designed router (ID): 0.0.0.0
Backup designed router (IP): 0.0.0.0
Interface em0 (185.17.0.0/24)
Type: broadcast
Area: 0.0.0.0 (0)
State: waiting (stub)
Priority: 1
Cost: 10
Hello timer: 10
Wait timer: 40
Dead timer: 40
Retransmit timer: 5
Designed router (ID): 0.0.0.0
Designed router (IP): 0.0.0.0
Backup designed router (ID): 0.0.0.0
Backup designed router (IP): 0.0.0.0
Interface em0 (185.17.1.0/24)
Type: broadcast
Area: 0.0.0.0 (0)
State: waiting (stub)
Priority: 1
Cost: 10
Hello timer: 10
Wait timer: 40
Dead timer: 40
Retransmit timer: 5
Designed router (ID): 0.0.0.0
Designed router (IP): 0.0.0.0
Backup designed router (ID): 0.0.0.0
Backup designed router (IP): 0.0.0.0
Interface em0 (185.17.2.0/24)
Type: broadcast
Area: 0.0.0.0 (0)
State: waiting (stub)
Priority: 1
Cost: 10
Hello timer: 10
Wait timer: 40
Dead timer: 40
Retransmit timer: 5
Designed router (ID): 0.0.0.0
Designed router (IP): 0.0.0.0
Backup designed router (ID): 0.0.0.0
Backup designed router (IP): 0.0.0.0
Interface em0 (185.17.3.0/24)
Type: broadcast
Area: 0.0.0.0 (0)
State: waiting (stub)
Priority: 1
Cost: 10
Hello timer: 10
Wait timer: 40
Dead timer: 40
Retransmit timer: 5
Designed router (ID): 0.0.0.0
Designed router (IP): 0.0.0.0
Backup designed router (ID): 0.0.0.0
Backup designed router (IP): 0.0.0.0
Interface em0 (193.93.192.0/22)
Type: broadcast
Area: 0.0.0.0 (0)
State: waiting (stub)
Priority: 1
Cost: 10
Hello timer: 10
Wait timer: 40
Dead timer: 40
Retransmit timer: 5
Designed router (ID): 0.0.0.0
Designed router (IP): 0.0.0.0
Backup designed router (ID): 0.0.0.0
Backup designed router (IP): 0.0.0.0
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