Análisis del intercambio OSPF para 2048 rutas sin clase
Fecha: 1 de noviembre
del 2023
Escenario
Este lab es una consecuencia del escenario anterior sobre la redistribución en OSPF
de 2048 rutas, y si se comporta
de igual manera al redistribuir rutas con máscaras diferentes a la default de la clase
C. Allí vamos…
1.- Generamos la
redistribución de las rutas /25:
El proceso de migrar las 2048 rutas /24 a /25 se
hizo con un script pero a modo didáctico sería:
1.1.- En Router-A:
conf t
no ip route 200.1.0.0 255.255.255.0 null0
ip route 200.1.0.0 255.255.255.128 null0
--- lo mismo para las 2047 rutas
restantes ---
!
router ospf 1
redistribute static subnets (esto ya se encuentra configurado
pero lo mostramos igual)
end
2.- Generamos las
adyacencias OSPF:
Router-A#
*Nov 1
15:26:44: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan2, changed state
to up
*Nov 1 15:26:59:
%OSPF-5-ADJCHG: Process 1, Nbr 10.0.0.2 on Vlan1 from LOADING to FULL, Loading
Done
Router-A#
Router-B#
Nov 1
15:26:44: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan2, changed state
to up
Nov 1
15:27:01: %OSPF-5-ADJCHG: Process 1, Nbr 10.0.0.1 on Vlan1 from LOADING to
FULL, Loading Done
Router-B#
3.- Verificamos en Router-B:
Router-B#sh ip route
Codes: L - local, C - connected, S - static, R -
RIP, M - mobile, B - BGP
D -
EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 -
OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 -
OSPF external type 1, E2 - OSPF external type 2
i -
IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia -
IS-IS inter area, * - candidate default, U - per-user static route
o -
ODR, P - periodic downloaded static route, + - replicated route
Gateway of last resort is not set
10.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C
10.0.0.0/30 is directly connected, Vlan1
L
10.0.0.2/32 is directly connected, Vlan1
200.1.0.0/25 is subnetted, 1 subnets
O E2
200.1.0.0 [110/20] via 10.0.0.1, 00:03:15, Vlan1
200.1.1.0/25 is subnetted, 1 subnets
O E2
200.1.1.0 [110/20] via 10.0.0.1, 00:03:15, Vlan1
200.1.2.0/25 is subnetted, 1 subnets
O E2
200.1.2.0 [110/20] via 10.0.0.1, 00:03:15, Vlan1
200.1.3.0/25 is subnetted, 1 subnets
O E2
200.1.3.0 [110/20] via 10.0.0.1, 00:03:16, Vlan1
200.1.4.0/25 is subnetted, 1 subnets
O E2
200.1.4.0 [110/20] via 10.0.0.1, 00:03:16, Vlan1
---resumido---
200.1.8.254/25 is subnetted, 1 subnets
O E2
200.1.8.254 [110/20] via 10.0.0.1, 00:03:16, Vlan1
200.1.8.255/25 is subnetted, 1 subnets
O E2
200.1.8.255 [110/20] via 10.0.0.1, 00:03:16, Vlan1
Router-B#
4.- Verificamos en
Wireshark:
Podemos ver que, a diferencia del lab anterior el
proceso ahora es Description + Update.
El proceso lleva 220 paquetes, contra 71 si las
redes tuvieran la máscara
default de la clase C.
4.1.- Aquí en el
Frame 4 comienza el anuncio de las redes en forma contígua:
Frame 4: 1498 bytes on wire (11984 bits), 1498 bytes
captured (11984 bits) on interface id 0
Ethernet II, Src: cc:46:d6:2b:5a:54, Dst:
70:81:05:b5:77:82
Internet Protocol Version 4, Src: 10.0.0.1, Dst: 10.0.0.2 (de Router-A a Router-B)
Open Shortest Path First
OSPF
Header
Version: 2
Message Type: LS Update (4)
Packet Length: 1468
Source OSPF Router: 10.0.0.1
Area ID: 0.0.0.0 (Backbone)
Checksum: 0xe46e [correct]
Auth Type: Null (0)
Auth Data (none): 0000000000000000
OSPF DB Description
Interface MTU: 1500
Options: 0x52, O, (L) LLS Data block, (E) External Routing
0... .... = DN: Not set
.1.. .... = O: Set
..0. .... = (DC) Demand Circuits: Not supported
...1 .... = (L) LLS Data block: Present
.... 0... = (N) NSSA: Not supported
.... .0.. = (MC) Multicast: Not capable
.... ..1. = (E) External Routing: Capable (porque es una redistribución de
estáticas en OSPF)
.... ...0 = (MT) Multi-Topology Routing: NoDB Description: 0x02, (M)
More
.... 0... = (R) OOBResync: Not set
.... .0.. = (I) Init: Not set
.... ..1. = (M) More: Set
.... ...0 = (MS) Master: No
DD
Sequence: 2971
LSA-type 1 (Router-LSA), len 36
.000 0000 0010 1100 = LS Age (seconds): 44
0... .... .... .... = Do Not Age Flag: 0
Options: 0x22, (DC) Demand Circuits, (E) External Routing
LS
Type: Router-LSA (1)
Link State ID: 10.0.0.1
Advertising Router: 10.0.0.1
Sequence Number: 0x80000002
Checksum: 0x2ee3
Length: 36
LSA-type 5 (AS-External-LSA (ASBR)), len 36 (al igual que el lab anterior aquí no se detalla la
máscara)
.000 0000 0110 1011 = LS Age (seconds): 107
0... .... .... .... = Do Not Age Flag: 0
Options: 0x20, (DC) Demand Circuits
LS
Type: AS-External-LSA (ASBR) (5)
Link State ID: 200.1.0.0
Advertising Router: 10.0.0.1
Sequence Number: 0x80000001
Checksum: 0x4cfe
Length: 36
LSA-type 5 (AS-External-LSA (ASBR)), len 36 (lo dejamos desplegado a modo de ejemplo)
.000 0000 0110 1011 = LS Age (seconds): 107
0... .... .... .... = Do Not Age Flag: 0
Options: 0x20, (DC) Demand Circuits
LS
Type: AS-External-LSA (ASBR) (5)
Link State ID: 200.1.1.0
Advertising Router: 10.0.0.1
Sequence
Number: 0x80000001
Checksum: 0x4109
Length: 36
LSA-type 5 (AS-External-LSA (ASBR)), len 36 (se muestran colapsadas para resumir)
LSA-type 5 (AS-External-LSA (ASBR)), len 36
LSA-type 5 (AS-External-LSA (ASBR)), len 36
LSA-type 5 (AS-External-LSA (ASBR)), len 36
LSA-type 5 (AS-External-LSA (ASBR)), len 36
---resumido---
LSA-type 5 (AS-External-LSA (ASBR)), len 36
LSA-type 5 (AS-External-LSA (ASBR)), len 36
LSA-type 5 (AS-External-LSA (ASBR)), len 36 (red 200.1.69.0, 70 rutas en total)
OSPF
LLS Data Block
4.2.- Aquí se solicita
mas información acerca de las redes especificadas:
Frame 8: 1510 bytes on wire (12080 bits), 1510 bytes
captured (12080 bits) on interface id 0
Ethernet II, Src: 70:81:05:b5:77:82, Dst:
cc:46:d6:2b:5a:54
Internet Protocol Version 4, Src: 10.0.0.2, Dst: 10.0.0.1 (respuesta desde Router-B)
Open Shortest Path First
OSPF
Header
Link State Request
LS
Type: Router-LSA (1)
Link State ID: 10.0.0.1
Advertising Router: 10.0.0.1
Link State Request
LS
Type: AS-External-LSA (ASBR) (5)
Link State ID: 200.1.0.0
Advertising Router: 10.0.0.1
Link
State Request (se muestran
colapsadas para resumir)
Link
State Request
---resumido---
Link
State Request
Link State
Request
Link
State Request
LS
Type: AS-External-LSA (ASBR) (5) (última red del paquete)
Link State ID: 200.1.121.0
Advertising Router: 10.0.0.1
4.3.- Esta es una
respuesta al Frame 8 detallando las máscaras de cada
subred:
Frame 10: 1502 bytes on wire
(12016 bits), 1502 bytes captured (12016 bits) on interface id 0
Ethernet II, Src: cc:46:d6:2b:5a:54, Dst:
70:81:05:b5:77:82
Internet Protocol Version 4, Src: 10.0.0.1, Dst: 10.0.0.2 (de Router-A a Router-B)
Open Shortest Path First
OSPF
Header
Version: 2
Message Type: LS Update (4)
Packet Length: 1468
Source OSPF Router: 10.0.0.1
Area ID: 0.0.0.0 (Backbone)
Checksum: 0xe46e [correct]
Auth Type: Null (0)
Auth Data (none): 0000000000000000
LS
Update Packet OSPF Header
LS Update Packet
Number of LSAs: 40
LSA-type 1 (Router-LSA), len 36
LSA-type 5 (AS-External-LSA (ASBR)), len 36
.000 0000 0110 1100 = LS Age (seconds): 108
0... .... .... .... = Do Not Age Flag: 0
Options: 0x20, (DC) Demand Circuits
LS Type: AS-External-LSA (ASBR) (5)
Link State ID: 200.1.0.0
Advertising Router: 10.0.0.1
Sequence Number: 0x80000001
Checksum: 0x4cfe
Length: 36
Netmask: 255.255.255.128
1... .... = External Type: Type 2 (metric is larger than any other link
state path)
.000 0000 = TOS: 0
Metric: 20
Forwarding Address: 0.0.0.0
External Route Tag: 0
LSA-type 5 (AS-External-LSA (ASBR)), len 36 (se muestran colapsadas para resumir)
LSA-type 5 (AS-External-LSA (ASBR)), len 36
LSA-type 5 (AS-External-LSA (ASBR)), len 36
---resumido---
LSA-type 5 (AS-External-LSA (ASBR)), len 36
LSA-type 5 (AS-External-LSA (ASBR)), len 36 (red 200.1.39.0, 40 rutas en total)
4.4.- Este Update de Router-B a
Router-A es una incógnita, ya que informa (erróneamente) la máscara de
ciertas
redes no contíguas y que no se encontraron logs del motivo. En el Frame 151 se encuentra el Update
desde
Router-A informando (en el mismo orden de anuncios de las redes discontiguas)
la máscara correcta.
Frame 144: 994 bytes on wire (7952 bits), 994 bytes captured (7952 bits) on id 0
Ethernet
II, Src: 70:81:05:b5:77:82, Dst: cc:46:d6:2b:5a:54
Internet
Protocol Version 4, Src:
10.0.0.2, Dst: 10.0.0.1 (respuesta desde Router-B)
Open Shortest Path First
OSPF Header
LS Update
Packet
Number of LSAs: 26
LSA-type 1 (Router-LSA), len 36
LSA-type 2 (Network-LSA), len 32
LSA-type 5 (AS-External-LSA (ASBR)), len
36
.000 0011 0101 0000 = LS Age
(seconds): 848
0... .... .... .... = Do Not Age
Flag: 0
Options: 0x20, (DC) Demand Circuits
LS Type: AS-External-LSA (ASBR) (5)
Link State ID: 200.1.30.0
Advertising Router: 10.0.0.1
Sequence Number: 0x80000001
Checksum: 0xfdaf
Length: 36
Netmask: 255.255.255.0
1... .... = External Type: Type 2
(metric is larger than any other link state path)
.000 0000 = TOS: 0
Metric: 20
Forwarding Address: 0.0.0.0
External Route Tag: 0
LSA-type 5 (AS-External-LSA (ASBR)),
len 36
.000 0011 0101 0000 = LS Age
(seconds): 848
0... .... .... .... = Do Not Age
Flag: 0
Options: 0x20, (DC) Demand Circuits
LS Type: AS-External-LSA (ASBR) (5)
Link State ID: 200.1.53.0 (podemos ver que las redes no son
contiguas)
Advertising Router: 10.0.0.1
Sequence Number: 0x80000001
Checksum: 0xff96
Length: 36
Netmask: 255.255.255.0
1... .... = External Type: Type 2
(metric is larger than any other link state path)
.000 0000 = TOS: 0
Metric: 20
Forwarding Address: 0.0.0.0
External Route Tag: 0
LSA-type 5 (AS-External-LSA (ASBR)),
len 36
.000 0011 0101 0001 = LS Age
(seconds): 849
0... .... .... .... = Do Not Age
Flag: 0
Options: 0x20, (DC) Demand Circuits
LS Type: AS-External-LSA (ASBR) (5)
Link State ID: 200.1.169.0 (podemos ver que las redes no son
contiguas)
Advertising Router: 10.0.0.1
Sequence Number: 0x80000001
Checksum: 0xfe23
Length: 36
Netmask: 255.255.255.0
1... .... = External Type: Type 2
(metric is larger than any other link state path)
.000 0000 = TOS: 0
Metric: 20
Forwarding Address: 0.0.0.0
External Route Tag: 0
LSA-type 5 (AS-External-LSA (ASBR)),
len 36 (solicita red
200.2.52.0)
LSA-type 5 (AS-External-LSA (ASBR)),
len 36 (solicita red
200.168.0)
LSA-type 5 (AS-External-LSA (ASBR)),
len 36 (solicita red
200.2.191.0)
LSA-type 5 (AS-External-LSA (ASBR)),
len 36 (solicita red
200.3.51.0)
LSA-type 5 (AS-External-LSA (ASBR)),
len 36 (solicita red
200.3.74.0)
LSA-type 5 (AS-External-LSA (ASBR)),
len 36 (solicita red
200.3.190.0)
LSA-type 5 (AS-External-LSA (ASBR)),
len 36
---resumido---
LSA-type 5 (AS-External-LSA (ASBR)),
len 36
LSA-type 5 (AS-External-LSA (ASBR)),
len 36
.000 0011 0101 0001 = LS Age
(seconds): 849
0... .... .... .... = Do Not Age
Flag: 0
Options: 0x20, (DC) Demand Circuits
LS Type: AS-External-LSA (ASBR) (5)
Link State ID: 200.8.254.0
Advertising Router: 10.0.0.1
Sequence Number: 0x80000001
Checksum: 0xffc5
Length: 36
Netmask: 255.255.255.0
1... .... = External Type: Type 2
(metric is larger than any other link state path)
.000 0000 = TOS: 0
Metric: 20
Forwarding Address: 0.0.0.0
External Route Tag: 0
4.5.- Aquí Router-B solicita mas
datos de las siguientes redes (se desconoce el motivo):
Frame 145: 1126 bytes on wire (9008 bits), 1126 bytes captured (9008 bits) on
interface id 0
Ethernet
II, Src: 70:81:05:b5:77:82, Dst: cc:46:d6:2b:5a:54
Internet Protocol
Version 4, Src: 10.0.0.2, Dst: 10.0.0.1
Open Shortest Path First
OSPF Header
Link
State Request
LS Type: AS-External-LSA (ASBR) (5)
Link State ID: 200.8.165.0
Advertising Router: 10.0.0.1
Link State Request
LS Type: AS-External-LSA (ASBR) (5)
Link State ID: 200.8.166.0
Advertising Router: 10.0.0.1
Link State Request (solicita red 200.8.167.0)
Link State Request (solicita red 200.8.168.0)
Link State Request
Link State Request
Link State Request
Link State Request
---resumido---
Link State Request
Link State Request
Link State Request (solicita red 200.8.254.0)
LS Type: AS-External-LSA (ASBR) (5)
Link State ID: 200.8.255.0
Advertising Router: 10.0.0.1
4.6.- Esta es la respuesta a la
solicitud en el Frame 145:
Frame 148: 1502 bytes on wire (12016 bits), 1502 bytes captured (12016 bits) on
interface id 0
Ethernet
II, Src: cc:46:d6:2b:5a:54, Dst: 70:81:05:b5:77:82
Internet Protocol
Version 4, Src: 10.0.0.1, Dst: 10.0.0.2
Open Shortest Path First
OSPF Header
LS Update
Packet
Number of LSAs: 40
LSA-type 5 (AS-External-LSA (ASBR)),
len 36
.000 0000 0110 1100 = LS Age
(seconds): 108
0... .... .... .... = Do Not Age
Flag: 0
Options: 0x20, (DC) Demand Circuits
LS Type: AS-External-LSA (ASBR) (5)
Link State ID: 200.8.165.0
Advertising Router: 10.0.0.1
Sequence Number: 0x80000001
Checksum: 0xd9c4
Length: 36
Netmask: 255.255.255.128
1... .... = External Type: Type 2
(metric is larger than any other link state path)
.000 0000 = TOS: 0
Metric: 20
Forwarding Address: 0.0.0.0
External Route Tag: 0
LSA-type 5 (AS-External-LSA (ASBR)),
len 36 (red
200.8.166.0)
LSA-type 5 (AS-External-LSA (ASBR)),
len 36
LSA-type 5 (AS-External-LSA (ASBR)),
len 36
---resumido---
LSA-type 5 (AS-External-LSA (ASBR)),
len 36
LSA-type 5 (AS-External-LSA (ASBR)),
len 36 (red
200.8.204.0)
4.6.- Esta es la respuesta al update
(con la máscara por default) del Frame 144:
Frame 151: 926 bytes on wire (7408 bits), 926 bytes captured (7408 bits) on
interface id 0
Ethernet
II, Src: cc:46:d6:2b:5a:54, Dst: 01:00:5e:00:00:05
Internet
Protocol Version 4, Src:
10.0.0.1, Dst: 224.0.0.5
Open Shortest Path First
OSPF Header
LS Update
Packet
Number of LSAs: 24
LSA-type 5 (AS-External-LSA (ASBR)),
len 36
.000 0000 0000 0001 = LS Age
(seconds): 1
0... .... .... .... = Do Not Age
Flag: 0
Options: 0x20, (DC) Demand Circuits
LS Type: AS-External-LSA (ASBR) (5)
Link State ID: 200.1.30.0
Advertising Router: 10.0.0.1
Sequence Number: 0x80000002
Checksum: 0xfe2d
Length: 36
Netmask: 255.255.255.128 (máscara
correcta)
1... .... = External Type: Type 2
(metric is larger than any other link state path)
.000 0000 = TOS: 0
Metric: 20
Forwarding Address: 0.0.0.0
External Route Tag: 0
LSA-type 5 (AS-External-LSA (ASBR)),
len 36
.000 0000 0000 0001 = LS Age
(seconds): 1
0... .... .... .... = Do Not Age
Flag: 0
Options: 0x20, (DC) Demand Circuits
LS Type: AS-External-LSA (ASBR) (5)
Link State ID: 200.1.53.0
Advertising Router: 10.0.0.1
Sequence Number: 0x80000002
Checksum: 0x0114
Length: 36
Netmask: 255.255.255.128
1... .... = External Type: Type 2
(metric is larger than any other link state path)
.000 0000 = TOS: 0
Metric: 20
Forwarding Address: 0.0.0.0
External Route Tag: 0
LSA-type 5 (AS-External-LSA (ASBR)),
len 36
.000 0000 0000 0001 = LS Age
(seconds): 1
0... .... .... .... = Do Not Age
Flag: 0
Options: 0x20, (DC) Demand Circuits
LS Type: AS-External-LSA (ASBR) (5)
Link State ID: 200.1.169.0
Advertising Router: 10.0.0.1
Sequence Number: 0x80000002
Checksum: 0xffa0
Length: 36
Netmask: 255.255.255.128
1... .... = External Type: Type 2
(metric is larger than any other link state path)
.000 0000 = TOS: 0
Metric: 20
Forwarding Address: 0.0.0.0
External Route Tag: 0
LSA-type 5 (AS-External-LSA (ASBR)),
len 36 (respuesta de
la red 200.2.52.0)
LSA-type 5 (AS-External-LSA (ASBR)),
len 36 (respuesta de
la red 200.168.0)
LSA-type 5 (AS-External-LSA (ASBR)),
len 36 (respuesta de
la red 200.2.191.0)
LSA-type 5 (AS-External-LSA (ASBR)),
len 36 (respuesta de
la red 200.3.51.0)
LSA-type 5 (AS-External-LSA (ASBR)),
len 36 (respuesta de
la red 200.3.74.0)
LSA-type 5 (AS-External-LSA (ASBR)),
len 36 (respuesta de
la red 200.3.190.0)
---resumido---
LSA-type 5 (AS-External-LSA (ASBR)),
len 36
LSA-type 5 (AS-External-LSA (ASBR)),
len 36
LSA-type 5 (AS-External-LSA (ASBR)),
len 36
.000 0000 0000 0001 = LS Age
(seconds): 1
0... .... .... .... = Do Not Age
Flag: 0
Options: 0x20, (DC) Demand Circuits
LS Type: AS-External-LSA (ASBR) (5)
Link State ID: 200.8.254.0
Advertising Router: 10.0.0.1
Sequence Number: 0x80000002
Checksum: 0x0143
Length: 36
Netmask: 255.255.255.128
1... .... = External Type: Type 2
(metric is larger than any other link state path)
.000 0000 = TOS: 0
Metric: 20
Forwarding Address: 0.0.0.0
External Route Tag: 0
4.7.- Este es el ACK
del update del Frame 10 que era una respuesta a la
solicitud de máscara del Frame 8 :
Frame 159: 1498 bytes on wire
(11984 bits), 1498 bytes captured (11984 bits) on interface id 0
Ethernet II, Src: 70:81:05:b5:77:82, Dst:
01:00:5e:00:00:06
Internet Protocol Version 4, Src: 10.0.0.2, Dst: 224.0.0.6 (respuesta
desde Router-B)
Open Shortest Path First
Open Shortest
Path First
OSPF
Header
Version: 2
Message Type: LS Acknowledge (5)
Packet Length: 1464
Source OSPF Router: 10.0.0.2
Area ID: 0.0.0.0 (Backbone)
Checksum: 0xeee7 [correct]
Auth Type: Null (0)
Auth Data (none): 0000000000000000
LSA-type 1 (Router-LSA), len 36
.000 0000 0010 1101 = LS Age (seconds): 45
0... .... .... .... = Do Not Age Flag: 0
Options: 0x22, (DC) Demand Circuits, (E) External Routing
0... .... = DN: Not set
.0.. .... = O: Not set
..1. .... = (DC) Demand Circuits: Supported
...0 .... = (L) LLS Data block: Not Present
.... 0... = (N) NSSA: Not supported
.... .0.. = (MC) Multicast: Not capable
.... ..1. = (E) External Routing: Capable
.... ...0 = (MT) Multi-Topology Routing: No
LS
Type: Router-LSA (1)
Link State ID: 10.0.0.1
Advertising Router: 10.0.0.1
Sequence Number: 0x80000002
Checksum: 0x2ee3
Length: 36
LSA-type 5 (AS-External-LSA (ASBR)), len 36
.000 0000 0110 1100 = LS Age (seconds): 108
0... .... .... .... = Do Not Age Flag: 0
Options:
0x20, (DC) Demand Circuits
0... .... = DN: Not set
.0.. .... = O: Not set
..1. .... = (DC) Demand Circuits: Supported
...0 .... = (L) LLS Data block: Not Present
.... 0... = (N) NSSA: Not supported
.... .0.. = (MC) Multicast: Not capable
.... ..0. = (E) External Routing: Not capable
.... ...0 = (MT) Multi-Topology Routing: No
LS
Type: AS-External-LSA (ASBR) (5)
Link State ID: 200.1.0.0
Advertising Router: 10.0.0.1
Sequence Number: 0x80000001
Checksum: 0x4cfe
Length: 36
LSA-type 5 (AS-External-LSA (ASBR)), len 36 (se muestran colapsadas para resumir)
LSA-type 5 (AS-External-LSA (ASBR)), len 36
---resumido---
LSA-type 5 (AS-External-LSA (ASBR)), len 36
LSA-type 5 (AS-External-LSA (ASBR)), len 36 (red
200.1.72.0)
4.8- Estos son ACK de
los sucesivos updates correspondientes a las solicitudes de cada subred:
No. Time
Source
Destination Protocol
Length Info
160 7.265
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
161 7.265
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
162 7.265
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
163 7.265
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
164 7.265
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
165 7.265
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
166 7.265
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
167 7.265
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
168 7.266
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
169 7.266
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
170 7.266
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
171 7.465
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
172 7.465
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
173 7.465
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
174 7.465
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
175 7.465
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
176 7.465
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
177 7.465
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
178 7.465
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
179 7.465
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
180 7.466
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
181 7.466
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
182 7.466
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
183 7.665
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
184 7.665
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
185 7.665
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
186 7.665
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
187 7.665
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
188 7.665
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
189 7.665
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
190 7.665
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
191 7.665
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
192 7.666
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
193 7.666
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
194 7.666
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
195 7.865
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
196 7.865
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
197 7.865
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
198 7.865
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
199 7.865
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
200 7.865
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
201 7.865
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
202 7.865
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
203 7.865
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
204 7.866
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
205 7.866
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
206 7.866
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
207 8.064
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
208 8.064
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
209 8.064
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
210 8.065
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
211 8.065
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
212 8.065
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
213 8.065
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
214 8.065
10.0.0.2
224.0.0.6 OSPF 1498
LS Acknowledge
215 8.065
10.0.0.2
224.0.0.6 OSPF 758
LS Acknowledge
216 8.065
10.0.0.2
224.0.0.6 OSPF 758
LS Acknowledge
5.- Resumen:
Los anuncios OSPF se comportan de manera
diferente al trabajar con las máscaras con clase o sin clase,
siendo mayor el número de paquetes involucrados
cuando se sale de la clase.
Aquí
dejo el archivo capturado con los paquetes OSPF.
(2023) Networks without
OSPF are just wires
Rosario, Argentina