OSPF authentication

I can't get a PIX 515E to form an adjacency with MSFC2 router using md5 authentication. MSFC2 goes from exstart to complain about too many broadcasts of dbd.

OK, thanks for checking out this. Looks like CSCeb77142 to me. Go ahead and open a TAC and request that the post of engineer the last 6.3 (3) provisional release for you. Give that a shot and let me know.

Scott

Tags: Cisco Security

Similar Questions

  • ASR900 - OSPF-4-NOVALIDKEY: no valid authentication send button is available on the interface

    Hello

    I have a few ASR902 running 15.4 (3) S1, where I see a lot of following messages:

    225908: 13:22:19.850 Feb 16 AST: OSPF-4-NOVALIDKEY %: no send to valid authentication key is available on the BDI960 interface
    225909: 13:22:36.571 Feb 16 AST: % 4-OSPF-INVALIDKEY: Key ID 0 receipts on the BDI960 interface
    225910: 13:23:19.921 Feb 16 AST: OSPF-4-NOVALIDKEY %: no send to valid authentication key is available on the BDI960 interface
    225911: 13:23:36.751 Feb 16 AST: % 4-OSPF-INVALIDKEY: Key ID 0 receipts on the BDI960 interface
    225912: 13:24:20.213 Feb 16 AST: OSPF-4-NOVALIDKEY %: no send to valid authentication key is available on the BDI960 interface
    225913: 13:24:36.819 Feb 16 AST: % 4-OSPF-INVALIDKEY: Key ID 0 receipts on the BDI960 interface
    225914: 13:25:20.304 Feb 16 AST: OSPF-4-NOVALIDKEY %: no send to valid authentication key is available on the BDI960 interface

    Applied to the interface configuration is the following:

    interface BDI960
    IP 10.1.1.1 255.255.255.252
    no ip redirection
    no ip proxy-arp
    IP mtu 9198
    PIM sparse-mode IP
    IP ospf message digest authentication
    IP ospf authentication-7 key<>
    IP ospf network point
    IP ospf dead-interval minimum Hello - multiplier 3
    IP ospf 1 zone 0
    no service autoconfiguration mpls ldp igp

    OSPF adjacency is in place and everything seems OK. Any idea?

    Thank you

    Pedro

    Hi Pedro,

    It is the actual config on the interface or you empty out the key?

    IP ospf authentication-7 key<>

    In addition, check your router upstream that it is configured to send the number to the right key. In the example below, the key is 1 and and it uses md5 with 7 encryption.

    IP ospf message-digest-key 1 md5 7 xxxxxxxxx

    -Mario

    P.S. If you look at your error message, it is said that the interface has received the wrong key: % 4-OSPF-INVALIDKEY: Key ID 0 receipts on the BDI960 interface

  • 3000 VPN concentrator using ospf md5 authentication failed

    Hi all

    I just tested ospf with a 3005 VPN connected with a cisco router using ospf md5 authentication, but fail. Cisco router, I can see neighbouring State ospf is "INIT", but can not see any connection VPN 3005, physical connection is good, ping can be reached between them. I tried the command "ip ospf authentication message-digest & ip ospf authentication-key ' and"ip ospf message-digest-key"command in the router the password is the same in both sides and the md5 id has been set. But when I use simple authentication or disable authentication that the neighbor relationship can ride. Any body met this case before? Thank you!

    Best regards

    Teru Lei

    Hello

    This is a known bug, I also met this before: CSCef38044

    It is not possible to accumulate OSPF with newer versions of IOS, on which they'RE ability is enabled using MD5 hash neighborship. They'RE capa is activated somewhere of 12.2 T. This behavior can be found on CVPN 4.1.5 and above whose 4.7 also.

    I tested it with several IOS and OS CVPN - same result. The symptom: router ospf neighborship remains in the State INIT/DROTHER.

    Workaround is to configure the router:

    router ospf 1

    No they're ability

    This will solve your problem.

    Attila Suba

  • VTI &amp; OSPF tunnel

    Hi all

    I have configured the interfaces of tunnel VTI (ipv4 ipsec tunnel mode) and OSPF on which interacts.

    VTI is encrypt all traffic data. But what about the OSPF traffic?

    Is encrypted as OSPF traffic or I need to configure OSPF authentication?

    Thank you

    OSPF Exchange is already encrypted inside the tunnel, so u don't have to use the ospf authentication. OSPF uses IPs of tunnel for the communications and traffic between these two addresses is possible only through the secure tunnel.

  • OSPF md5 on pix515 v6.3

    Can someone show me where are the configuration examples showing how the actual ospf md5 key is configured on the pix firewall. (or command that allows this, the only one I can find involves a virtual link)

    Hi neil

    It must appear on the interface subcommand.

    command:

    Routing intf_name interface

    subcommands:

    touch key md5 OSPF message-digest-key id

    OSPF authentication key password

    OSPF authentication [message digest: null]

    and a lot of other stuff too...

    You can view the presentation of control "routing interface" commands on the following URL:

    http://www.Cisco.com/univercd/CC/TD/doc/product/iaabu/PIX/pix_sw/v_63/cmdref/Mr.htm#wp1097803

    I hope this helps... all the best.rate response (s), if considered useful...

    REDA

  • I need help quick-PIX 515e worm. 6.3 (5)

    I'm new to this Cisco product and I'm in a jam. I got to get this product operational tomorrow morning.

    (Problem :) I've got communications running inside the firewall, and with an access list I can ping the outside world with success; However, if on the inside, behind the firewall, I can't see anything through a web browser. It's as if the traffic does not go through. Please help, what should I do?

    Here's a copy of the current configuration:

    6.3 (5) PIX version

    interface ethernet0 car

    Auto interface ethernet1

    ethernet0 nameif outside security0

    nameif ethernet1 inside the security100

    enable password xxxx

    passwd xxxx

    pixfirewall hostname

    domain ciscopix.com

    clock timezone IS - 5

    clock to summer time EDT recurring

    fixup protocol dns-length maximum 512

    fixup protocol ftp 21

    fixup protocol h323 h225 1720

    fixup protocol h323 ras 1718-1719

    fixup protocol http 80

    fixup protocol rsh 514

    fixup protocol rtsp 554

    fixup protocol sip 5060

    fixup protocol sip udp 5060

    fixup protocol 2000 skinny

    fixup protocol smtp 25

    fixup protocol sqlnet 1521

    fixup protocol tftp 69

    object-group service Internet tcp - udp

    Description of the group for Internet access

    port-object eq echo

    port-object eq www

    area of port-object eq

    interface icmp permit access-list inside_access_in inside the interface outside response to echo

    interface icmp permit access-list inside_access_in inside the interface outside time limit

    inside_access_in list of permitted access interface icmp inside the outside interface is inaccessible

    inside_access_in tcp allowed access list any object-group Internet any newspaper Internet-Group of objects

    inside_access_in tcp allowed access list any Internet host 208.50.85.161 object-group newspaper Internet object-group

    pager lines 24

    ICMP allow any inside

    Outside 1500 MTU

    Within 1500 MTU

    IP address outside the 208.x.x.x.255.255.224

    IP address inside 192.168.1.1 255.255.255.0

    alarm action IP verification of information

    alarm action attack IP audit

    no failover

    failover timeout 0:00:00

    failover poll 15

    No IP failover outdoors

    No IP failover inside

    208.50.x.x.x.255.255 PDM location outdoors

    PDM logging 100 information

    history of PDM activate

    ARP timeout 14400

    Global (outside) 10 192.168.1.3 - 192.168.1.254 netmask 255.255.255.0

    Global (inside) 1 192.168.1.3 - 192.168.1.254

    NAT (inside) 0-list of access inside_outbound_nat0_acl

    NAT (inside) 10 0.0.0.0 0.0.0.0 0 0

    inside_access_in access to the interface inside group

    routing to the outside interface

    OSPF authentication null

    routing inside interface

    OSPF authentication null

    Route outside 0.0.0.0 0.0.0.0 208.50.85.161 1

    Timeout xlate 03:00

    Timeout conn 01:00 half-closed 0:10:00 udp 0: CPP 02:00 0:10:00 01:00 h225

    H323 timeout 0:05:00 mgcp 0: sip from 05:00 0:30:00 sip_media 0:02:00

    Sip timeout - disconnect 0:02:00 prompt Protocol sip-0: 03:00

    Timeout, uauth 0:05:00 absolute

    GANYMEDE + Protocol Ganymede + AAA-server

    AAA-server GANYMEDE + 3 max-failed-attempts

    AAA-server GANYMEDE + deadtime 10

    RADIUS Protocol RADIUS AAA server

    AAA-server RADIUS 3 max-failed-attempts

    AAA-RADIUS deadtime 10 Server

    AAA-server local LOCAL Protocol

    disable proxy-limit AAA

    Enable http server

    http 192.168.1.0 255.255.255.0 inside

    No snmp Server contact

    SNMP-server community

    No trap to activate snmp Server

    enable floodguard

    Permitted connection ipsec sysopt

    No.-xauth No.-config-mode

    part of pre authentication ISAKMP policy 20

    encryption of ISAKMP policy 20

    ISAKMP policy 20 md5 hash

    20 2 ISAKMP policy group

    ISAKMP duration strategy of life 20 86400

    Telnet timeout 5

    SSH timeout 5

    Console timeout 0

    dhcpd address 192.168.1.2 - 192.168.1.254 inside

    dhcpd dns 206.165.6.11 209.130.136.2

    dhcpd lease 3600

    dhcpd ping_timeout 750

    dhcpd outside auto_config

    dhcpd allow inside

    Terminal width 80

    Cryptochecksum:xxxx

    : end

    inside_access_in ip access list allow a whole

    That's my guess.

    Im a gui guy, never use the cli. Good luck

  • Twice NAT on Site at the tunnel with the same private networks.

    Hello

    Currently, I am trying to configure a Site to Site tunnel between an IOS router and an ASA 5505 running 9.1

    When deprived of the IOS router subnet was 10.0.0.0/24 and the subnet private SAA was 172.16.1.0/24, it connected properly.

    I'm now putting in place where the two private networks is 10.0.0.0/24 and objects network created, edited the ACL for interesting traffic and created the rule of NAT translation and twice, but the tunnels are not coming. I was hoping someone could shed some light on where I'm wrong.

    There are route it (R1) IOS and ASA (F2). Between them is an Internet addresses asking the router which is just set up to allow both sides to achieve their WAN.

    R1 and F2 have private network (10.0.0.0/24) need to communicate. Twice NAT can be done on the ASA to allow this, but I have to do something wrong. The way I understand it, is that the R1 should see traffic coming from 10.51.0.0/24 and send to this traffic. The ASA will have this traffic and the inside network should see it coming entering as 10.50.0.0/24. If F2's private network communicates with 10.50.0.0/24, and the private network R1 sends traffic to 10.51.0.0/24.

    I turned on "Debug crypto ipsec" and "debug crypto isakmp" but no output is appear or give any indication that she is trying to establish anything.

    Any help would be greatly appreciated! Thank you!

    R1 #show run

    version 12.4

    hostname R1

    crypto ISAKMP policy 50
    BA 3des
    preshared authentication
    Group 2
    address of cisco crypto isakmp 10.2.0.254 keys

    Crypto ipsec transform-set esp-3des esp-sha-hmac L2L_SET

    50 CRYPTO ipsec-isakmp crypto map
    defined by peer 10.2.0.254
    game of transformation-L2L_SET
    match address CRYPTO

    interface FastEthernet0/0
    10.0.0.253 IP address 255.255.255.0
    IP nat inside
    IP virtual-reassembly
    IP ospf message digest authentication
    Cisco IP ospf authentication key
    automatic duplex
    automatic speed

    interface FastEthernet0/1
    IP 10.1.0.254 255.255.255.0
    NAT outside IP
    IP virtual-reassembly
    IP ospf message digest authentication
    Cisco IP ospf authentication key
    automatic duplex
    automatic speed
    Crypto card CRYPTO

    IP classless
    IP route 0.0.0.0 0.0.0.0 10.1.0.253
    IP route 10.2.0.0 255.255.255.0 10.1.0.253
    !
    !
    IP http server
    no ip http secure server
    overload of IP nat inside source list SHEEP interface FastEthernet0/1
    !
    IP extended CRYPTO access list
    Licensing ip 10.0.0.0 0.0.0.255 10.51.0.0 0.0.0.255
    SHEEP extended IP access list
    deny ip 10.0.0.0 0.0.0.255 10.51.0.0 0.0.0.255
    allow an ip

    =========================================================================

    See the F2 # running
    : Saved
    :
    ASA Version 9.1 (1)
    !
    hostname F2
    activate 3a57ZsZ4Kgc.ZsL0 encrypted password
    3a57ZsZ4Kgc.ZsL0 encrypted passwd
    names of

    interface Vlan1
    nameif inside
    security-level 100
    IP 10.0.0.254 255.255.255.0
    !
    interface Vlan2
    nameif outside
    security-level 0
    IP 10.2.0.254 255.255.255.0

    network of the PRIVATE object
    10.0.0.0 subnet 255.255.255.0

    network of the PARTNER_PRIVATE object
    10.0.0.0 subnet 255.255.255.0
    network of the PARTNER_VPN_INBOUND object
    10.50.0.0 subnet 255.255.255.0
    network of the PARTNER_VPN_OUTBOUND object
    10.51.0.0 subnet 255.255.255.0

    Access extensive list permits all ip a OUTSIDE_IN
    CRYPTO extended access list ip 10.0.0.0 allow 255.255.255.0 10.50.0.0 255.255.255.0

    NAT static (inside, outside) PARTNER_VPN_OUTBOUND PRIVATE destination static source PARTNER_PRIVATE PARTNER_VPN_INBOUND
    !
    network of the PRIVATE object
    NAT dynamic interface (indoor, outdoor)
    Access-group OUTSIDE_IN in interface outside
    Route outside 0.0.0.0 0.0.0.0 10.2.0.253 1
    outdoor 10.1.0.0 255.255.255.0 10.2.0.253 1
    the ssh LOCAL console AAA authentication

    Crypto ipsec transform-set esp-3des esp-sha-hmac L2L_SET ikev1
    Crypto ipsec pmtu aging infinite - the security association
    crypto L2L_MAP 50 card matches the address CRYPTO
    card crypto L2L_MAP 50 set peer 10.1.0.254
    card crypto L2L_MAP 50 set transform-set L2L_SET ikev1
    L2L_MAP interface card crypto outside
    trustpool crypto ca policy
    Crypto ikev1 allow outside
    IKEv1 crypto policy 50
    preshared authentication
    3des encryption
    sha hash
    Group 2
    life 86400

    tunnel-group 10.1.0.254 type ipsec-l2l
    IPSec-attributes tunnel-group 10.1.0.254
    IKEv1 pre-shared-key *.

    object network PRIVATE
    
    subnet 10.0.0.0 255.255.255.0
    

    object network PARTNER_PRIVATE
    
    subnet 10.0.0.0 255.255.255.0
    
    object network PARTNER_VPN_INBOUND
    
    subnet 10.50.0.0 255.255.255.0
    
    object network PARTNER_VPN_OUTBOUND
    
    subnet 10.51.0.0 255.255.255.0
    

    access-list OUTSIDE_IN extended permit ip any any
    
    access-list CRYPTO extended permit ip 10.0.0.0 255.255.255.0 10.50.0.0 255.255.255.0
    

    nat (inside,outside) source static PRIVATE PARTNER_VPN_OUTBOUND destination static PARTNER_PRIVATE PARTNER_VPN_INBOUND

    Here in nat rule u use subnet PARTNER_PRIVATE, which is the same as a local, so the devices never send this traffic to the ASA, cause they know that this subnet (10.0.0.0/24) is in their local subnet. Therefore, you must write the nat rule in this way (i.e. the change of objects Web places):

    nat (inside,outside) source static PRIVATE PARTNER_VPN_OUTBOUND destination
    
static  PARTNER_VPN_INBOUND PARTNER_PRIVATE

    So the hosts on the subnet behind ASA will see the hosts on the subnet behind SRI as 10.50.0.0/24 and trying to reach the subnet behind SRI, you must use the 10.50.0.x one-to-one wich addresses correspond to 10.0.0.x it.

    In addition, your proxy-acl on asa must use post-nat addresses, which should look like this:

    IP 10.51.0.0 allow CRYPTO access list 255.255.255.0 10.0.0.0 255.255.255.0

  • FlexVPN and OSPF question

    I have a problem with rountig OSPF on the routers configured in the hub-and-spoke topology.

    One question is on a course that OSPF don't advertise hub to rays.

    Created on a hub, router subnets are not seen on the rays, but new added subnet on talk appears in the table of routing hub.

    The addition of broadcast command network ip ospf on a virtual-template interface hub causes OSPF adjacency downstairs.

    Also, EIGRP works very well.

    A that someone has experienced this problem with OSPF.

    Please, look at a few config below;

    -----------------------HUB-------------------------------

    IKEv2 crypto by default authorization policy

    Road enabled interface

    !

    Crypto ikev2 proposal ikev2_prop

    encryption aes-cbc-256

    integrity sha512

    Group 16

    !

    IKEv2 crypto policy ikev2_policy

    proposal ikev2_prop

    !

    Crypto ikev2 keyring Flex_key

    Rays peer

    address 192.168.50.197

    pre-shared key local 12345

    pre-shared key remote 12345

    !

    peer RTB

    address 192.168.50.199

    pre-shared key local 12345

    pre-shared key remote 12345

    !

    Profile of ikev2 crypto Flex_IKEv2

    match one address remote identity 192.168.50.197 255.255.255.255

    match one address remote identity 192.168.50.199 255.255.255.255

    sharing front of remote authentication

    sharing of local meadow of authentication

    local Flex_key keychain

    virtual-model 1

    !

    no default isakmp crypto policy

    !

    Crypto ipsec transform-set esp - aes 256 esp-sha512-hmac ipsec_trans

    tunnel mode

    !

    by default the crypto ipsec profile

    Set transform-set ipsec_trans

    Flex_IKEv2 Set ikev2-profile

    !

    interface Loopback1

    address 172.16.10.1 IP 255.255.255.0

    IP ospf 10 area 0

    !

    interface Loopback10

    10.1.1.1 IP address 255.255.255.0

    IP ospf 10 area 0

    !

    interface Loopback50

    IP 50.1.1.1 255.255.255.0

    IP 10 50 ospf area

    !

    the Embedded-Service-Engine0/0 interface

    no ip address

    !

    interface GigabitEthernet0/1

    bandwidth 100000

    IP 192.168.50.198 255.255.255.0

    automatic duplex

    automatic speed

    !

    type of interface virtual-Template1 tunnel

    IP unnumbered Loopback1

    IP 1400 MTU

    IP tcp adjust-mss 1360

    source of tunnel GigabitEthernet0/1

    ipv4 ipsec tunnel mode

    tunnel path-mtu-discovery

    tunnel protection ipsec default profile

    !

    router ospf 10

    redistribute connected subnets

    Network 10.1.1.0 0.0.0.255 area 0

    SH cryp ike his

    IPv4 Crypto IKEv2 SA

    Tunnel-id Local Remote fvrf/ivrf status

    1 192.168.50.198/500 192.168.50.197/500 no/no LOAN

    BA: AES - CBC, keysize: 256, Hash: SHA512, DH Grp:16, Auth sign: PSK, Auth check: PSK

    Duration of life/active: 86400/77565 sec

    Tunnel-id Local Remote fvrf/ivrf status

    2 192.168.50.198/500 192.168.50.199/500 no/no LOAN

    BA: AES - CBC, keysize: 256, Hash: SHA512, DH Grp:16, Auth sign: PSK, Auth check: PSK

    Duration of life/active: 86400/77542 sec

    IPv6 Crypto IKEv2 SA

    SH ip rou

    S * 0.0.0.0/0 [1/0] via 192.168.50.1

    10.0.0.0/8 is variably divided into subnets, 2 subnets, 2 masks

    C 10.1.1.0/24 is directly connected, Loopback10

    L 10.1.1.1/32 is directly connected, Loopback10

    50.0.0.0/8 is variably divided into subnets, 2 subnets, 2 masks

    C 50.1.1.0/24 is directly connected, Loopback50

    L 50.1.1.1/32 is directly connected, Loopback50

    100.0.0.0/32 is divided into subnets, subnets 1

    AI 100.1.1.1 [110/2] via 172.16.10.254, 21:32:58, Virtual Network1

    172.16.0.0/16 is variably divided into subnets, 2 subnets, 2 masks

    172.16.10.0/24 C is directly connected, Loopback1

    L 172.16.10.1/32 is directly connected, Loopback1

    192.168.50.0/24 is variably divided into subnets, 2 subnets, 2 masks

    C 192.168.50.0/24 is directly connected, GigabitEthernet0/1

    The 192.168.50.198/32 is directly connected, GigabitEthernet0/1

    200.1.1.0/32 is divided into subnets, subnets 1

    AI 200.1.1.1 [110/2] via 172.16.10.253, 21:32:38, Access2-virtual

    201.1.1.0/32 is divided into subnets, subnets 1

    AI 201.1.1.1 [110/2] via 172.16.10.253, 21:32:38, Access2-virtual

    220.1.1.0/32 is divided into subnets, subnets 1

    AI 220.1.1.1 [110/2] via 172.16.10.253, 00:06:11, Access2-virtual

    ---------------------------SPOKE---------------------------------------------

    Crypto ikev2 proposal ikev2_prop

    encryption aes-cbc-256

    integrity sha512

    Group 16

    !

    IKEv2 crypto policy ikev2_policy

    proposal ikev2_prop

    !

    Crypto ikev2 keyring Flex_key

    Rays peer

    address 192.168.50.198

    pre-shared key local 12345

    pre-shared key remote 12345

    !

    Profile of ikev2 crypto Flex_IKEv2

    match one address remote identity 192.168.50.198 255.255.255.0

    sharing front of remote authentication

    sharing of local meadow of authentication

    local Flex_key keychain

    virtual-model 1

    !

    no default isakmp crypto policy

    !

    !

    Crypto ipsec transform-set esp - aes 256 esp-sha512-hmac ipsec_trans

    tunnel mode

    !

    by default the crypto ipsec profile

    Set transform-set ipsec_trans

    Flex_IKEv2 Set ikev2-profile

    !

    interface Loopback200

    200.1.1.1 IP address 255.255.255.0

    IP ospf 10 200 area

    !

    interface Loopback201

    IP 201.1.1.1 255.255.255.0

    IP ospf 10 201 area

    !

    interface Loopback220

    IP 220.1.1.1 255.255.255.0

    IP ospf 10 220 area

    !

    Tunnel1 interface

    IP 172.16.10.253 255.255.255.0

    IP 1400 MTU

    IP tcp adjust-mss 1360

    source of tunnel GigabitEthernet0/1

    ipv4 ipsec tunnel mode

    tunnel destination 192.168.50.198

    tunnel path-mtu-discovery

    tunnel protection ipsec shared default profile

    !

    interface GigabitEthernet0/1

    IP 192.168.50.199 255.255.255.0

    automatic duplex

    automatic speed

    !

    router ospf 10

    network 172.16.10.0 0.0.0.255 area 0

    SH cryp ike his

    IPv4 Crypto IKEv2 SA

    Tunnel-id Local Remote fvrf/ivrf status

    1 192.168.50.199/500 192.168.50.198/500 no/no LOAN

    BA: AES - CBC, keysize: 256, Hash: SHA512, DH Grp:16, Auth sign: PSK, Auth check: PSK

    Duration of life/active: 77852/86400 sec

    IPv6 Crypto IKEv2 SA

    SH ip route

    S * 0.0.0.0/0 [1/0] via 192.168.50.1

    172.16.0.0/16 is variably divided into subnets, 2 subnets, 2 masks

    172.16.10.0/24 C is directly connected, Tunnel1

    L 172.16.10.253/32 is directly connected, Tunnel1

    192.168.50.0/24 is variably divided into subnets, 2 subnets, 2 masks

    C 192.168.50.0/24 is directly connected, GigabitEthernet0/1

    The 192.168.50.199/32 is directly connected, GigabitEthernet0/1

    200.1.1.0/24 is variably divided into subnets, 2 subnets, 2 masks

    C 200.1.1.0/24 is directly connected, Loopback200

    L 200.1.1.1/32 is directly connected, Loopback200

    201.1.1.0/24 is variably divided into subnets, 2 subnets, 2 masks

    C 201.1.1.0/24 is directly connected, Loopback201

    L 201.1.1.1/32 is directly connected, Loopback201

    220.1.1.0/24 is variably divided into subnets, 2 subnets, 2 masks

    C 220.1.1.0/24 is directly connected, Loopback220

    L 220.1.1.1/32 is directly connected, Loopback220

    SH ip ospf database ro 172.16.10.1

    Router OSPF with ID (200.1.1.1) (the process ID of 10)

    Router link States (zone 0)

    ADV router is accessible via is not in the Base with MTID topology 0

    LS age: 336

    Options: (no TOS-capability, DC)

    LS type: Router links

    Link state ID: 172.16.10.1

    Advertising router: 172.16.10.1

    LS number of Seq: 80000065

    Checksum: 0x4B6E

    Length: 60

    Area border router

    ROUTER limits

    Number of links: 3

    Link to: a Stub network

    (Link ID) Network/subnet number: 10.1.1.1

    (Data link) Network mask: 255.255.255.255

    Number of parameters MTID: 0

    TOS 0 metric: 1

    Link to: another router (point to point)

    (Link ID) Neighbors router ID: 100.1.1.1

    (Data link) Address of the router Interface: 0.0.0.18

    Number of parameters MTID: 0

    TOS 0 metric: 1

    Link to: another router (point to point)

    (Link ID) The router ID neighbors: 200.1.1.1

    (Data link) Address of the router Interface: 0.0.0.17

    Number of parameters MTID: 0

    TOS 0 metric: 1

    Kamil,

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    R1(Gi1/0/19) - R (article gi1/0/19)

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    ===========

    Current configuration: 2129 bytes

    !

    version 12.2

    no service button

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    no password encryption service

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    boot-start-marker

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    interface GigabitEthernet1/0/13

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    interface GigabitEthernet1/0/14

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    interface GigabitEthernet1/0/15

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    interface GigabitEthernet1/0/16

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    ==================================================

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    boot-start-marker

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    !

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    No aaa new-model

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    interface GigabitEthernet1/0/5

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    interface GigabitEthernet1/0/6

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    interface GigabitEthernet1/0/7

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    interface GigabitEthernet1/0/8

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    interface GigabitEthernet1/0/9

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    interface GigabitEthernet1/0/10

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    interface GigabitEthernet1/0/11

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    interface GigabitEthernet1/0/13

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    interface GigabitEthernet1/0/14

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    interface GigabitEthernet1/0/15

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    interface GigabitEthernet1/0/16

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    interface GigabitEthernet1/0/18

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    interface GigabitEthernet1/0/20

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    interface GigabitEthernet1/0/21

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    interface GigabitEthernet1/0/22

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    interface GigabitEthernet1/0/23

    Shutdown

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    interface Vlan1

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    IP classless

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    !

    activate the IP sla response alerts

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    !

    !

    Line con 0

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    !

    control the source session interface 1 item in gi1/0/19

    control interface of destination session 1 item in gi1/0/17

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    ====================

    The #sho switch ip interface brief | include the

    GigabitEthernet1/0/17 no undefined upward down YES

    20.20.20.20 GigabitEthernet1/0/19 YES manual up up

    Loopback1 20.20.20.20 YES manual up up

    ====================================

    Thank you very much in advance for your answer!

    Kind regards

    Aerts

    Hi AEK.

    the IP unnumbered command does not work on multiaccess-interfaces such as Ethernet (even when you set it up as a point-to-point OSPF):

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    Cisco IOS IP Addressing Services Command Reference #ip unnumberd

    HTH

    Rolf

    [EDIT]:

    ... apparently, with the exception of high range as the 6 k platforms:

    Order history

    (...)

    12.2 (18) SXF: this command has been modified to support the physical Ethernet interfaces and switched virtual interfaces (LASS).

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