eva.castro at gmail
Dec 15, 2011, 3:52 PM
Views: 152
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Same router-LSA with different sequence number
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Hi,
Im testing a simple ospf example (see attached figure). Im using
Quagga 0.99.10 version.
I start quagga at r1. When DR is elected at 100.0.0.0/16, I start quagga at r2.
The ospf configuration files are:
ospfd.conf at r1:
---------------------------------
! -*- ospf -*-
!
! OSPFd sample configuration file
!
!
hostname ospfd
password zebra
router ospf
router-id 100.0.0.1
network 11.0.0.0/16 area 0
network 100.0.0.0/16 area 0
ospfd.conf at r2:
---------------------------------
! -*- ospf -*-
!
! OSPFd sample configuration file
!
!
hostname ospfd
password zebra
router ospf
router-id 100.0.0.2
network 12.0.0.0/16 area 0
network 100.0.0.0/16 area 0
I attach a capture file with the captured packets when quagga at r2 is starting.
My question is related to packets 23 and 34. These two packets are
Router-LSA from r2. They are the same Router-LSA content, however they
have different sequence number: 0x80000002 and 0x80000003.
Why r2 is sending the packet 34 with the same content but different
sequence number 35 secs later?
Thanks in advance,
eva
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ospf-quagga-2r.cap
ospf-quagga.png
Same router-LSA with different sequence number