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Inter VLAN routing: Can ping default VLAN IP from other VLAN's but no further. Default VLAN IP not forwarding the request?

Tom
Level 1
Level 1

Hi All,

 

Please bear with me as I'm new to this and relatively new to Networking at this level.

I'm trying to set up inter VLAN routing.  Following this post:

https://www.cisco.com/c/en/us/support/docs/lan-switching/inter-vlan-routing/41860-howto-L3-intervlanrouting.html

I've configured everything I could (or perhaps almost everything except for 6) Configure the interface to the default router.  part. ).  This is an older Cisco 3750G switch:  

 

VLAN1 192.168.0 (IP 192.168.0.3, Secondary 192.168.0.4)
VLAN2 10.0.0.0 ( IP 10.0.0.1 )
VLAN3 10.1.0.0 ( IP 10.1.0.1 )
VLAN4 10.2.0.0 ( IP 10.2.0.1 )

Now from the switch itself, I can ping all IP's without any issues.  For example, I can ping 192.168.0.100 from the switch but not from within VLAN 2 devices.  However, I can ping 192.168.0.3 and 192.168.0.4 (secondary), the switch VLAN 1 IP's from within devices on VLAN 2. 

 

Devices on VLAN2 can ping each other, the VLAN IP and even the default VLAN (Switch IP) 192.168.0.3 and 192.168.0.4  above.  But nothing beyond the two VLAN 1 IP's above.  What am I missing?  My first thought is missing trunking or a setting on VLAN1 but I'm not 100% on that nor what those commands would be.

 

Thx,

 

mdscisco01#show ip route
Codes: 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

Gateway of last resort is 192.168.0.1 to network 0.0.0.0

     10.0.0.0/24 is subnetted, 1 subnets
C       10.0.0.0 is directly connected, Vlan2
C    192.168.0.0/24 is directly connected, Vlan1
S*   0.0.0.0/0 [1/0] via 192.168.0.1
mdscisco01#

 

61 Replies 61

Yep, I was 99% sure that was the case.

 

The Asus router supports OSPF just fine.  OSPF v2 and v3 is supported.  v3 if I ever want to tinker around with IPv6, but not now.

 

So I've enabled OSPF on the Asus router.  And both the Cisco and Asus exchanged the databases successfully.  Now inter-VLAN communication was not broken but access to the web / internet was broken for all VLAN's.  I figured this out as well.  A bunch of NAT rules were removed when the router was reconfigured from Gateway to OSPF Router.  I'm about to add them back in to see if web access will work even if OSPF is enabled on the Asus router.

 

This brings me back to my original question.  When reading in the DD-WRT help menus, it had the following comment:

 

Note:
Dynamic Routing is not available in Gateway mode.

 

Hence why I asked.  

 

Thx,
TK

@Jaderson Pessoa 

As you've indicated in an earlier post, I've enabled OSPF v2 on the Asus DD-WRT router, changing it from a Gateway router.  This took a bit of tweaking since I had to add some NAT rules to make this work.  Again, something you also indicated.  A twist was that the earlier Asus DD-WRT firmware either didn't support NAT w/ OSPF or had a bug.  I had to update the Asus DD-WRT firmware to DD-WRT v3.0-r40559 std (08/06/19) to fix that.

 

Wrote it up and shared it here: Asus, Cisco 3750G, OSPF v2 and intervlan routing

 

So followed everything nearly 100% exactly as you've specified above w/ the exception of the firmware issue, and everything works as expected wo/ static routes on the Asus router.  Thank you very much again!  Very much appreciate both your help here gentlemen. 

 

Thx,

great guy... this sound's amazing.. good lucky :)
Jaderson Pessoa
*** Rate All Helpful Responses ***

Spoke too soon.  After removing the static routes, ping still worked but I didn't give it enough time.  Sometime overnight ping stopped to work for VLAN 2, 3, 4.  I added the static routes back and OSPF picked them up again.

 

Cisco 3875G:

Switch Ports Model SW Version SW Image
------ ----- ----- ---------- ----------
* 1 28 WS-C3750G-24PS 12.2(40)SE C3750-IPSERVICESK9-M

AsusRouter:

AsusRouter# sh version
FRRouting 7.1 (DD-WRT-INTERNET-ASUS).
Copyright 1996-2005 Kunihiro Ishiguro, et al.
configured with:
'--host=arm-uclibc-linux' '--localstatedir=/var/run' '--libdir=/usr/tmp' '--with-vtysh-pager=less' '--disable-eigrpd' '--disable-pbrd' '--disable-ldpd' '--disable-rfptest' '--disable-ssd' '--disable-doc' '--disable-zeromq' '--enable-opaque-lsa' '--enable-ospf-te' '--disable-ospfclient' '--enable-multipath=32' '--enable-ipv6' '--prefix=/usr' '--sysconfdir=/tmp' '--disable-ospf6d' '--enable-vtysh' '--enable-user=root' '--enable-group=root' '--disable-ospfapi' '--disable-isisd' '--disable-pimd' '--disable-nhrpd' '--disable-staticd' '--disable-bfdd' '--disable-babeld' '--enable-pie=no' '--with-libreadline=/home/seg/DEV/northstar/src/router/readline' 'LIBYANG_CFLAGS=-I/home/seg/DEV/northstar/src/router/libyang/src' 'LIBYANG_LIBS=-L/home/seg/DEV/northstar/src/router/libyang -lyang -L/home/seg/DEV/northstar/src/router/pcre/.libs -lpcre' 'host_alias=arm-uclibc-linux' 'CC=ccache arm-linux-uclibc-gcc' 'CXX=ccache arm-linux-uclibc-g++'
AsusRouter#

Looks like I have to keep the static routes unless I'm missing something in the OSPF configuration.  I guess what I'm not really clear on is how OSPF picks up routes if I don't have any specific ones defined?   The only way I can see how is from the packet itself if not from anything statically defined.

 

I've included the software versions above in case there's a version mismatch between OSPF implementations or F/W versions?

 

Thx,
TK

post here ospf configuration from both routers and share output from commands below;

show ip protocols
show ip route
show ip ospf neighbors
show run | sec ospf
Jaderson Pessoa
*** Rate All Helpful Responses ***

This is the configuration with the static routes added in:

 

Asus Router:

AsusRouter#
AsusRouter# show ip protocols
% Unknown command: show ip protocols
AsusRouter# show ip route
Codes: K - kernel route, C - connected, S - static, R - RIP,
       O - OSPF, I - IS-IS, B - BGP, E - EIGRP, N - NHRP,
       T - Table, v - VNC, V - VNC-Direct, A - Babel, D - SHARP,
       F - PBR, f - OpenFabric,
       > - selected route, * - FIB route, q - queued route, r - rejected route

K>* 0.0.0.0/0 [0/0] via 123.123.123.97, vlan2, 07:29:17
K>* 10.0.0.0/24 [0/0] via 192.168.0.1, br0, 07:29:17
K>* 10.1.0.0/24 [0/0] via 192.168.0.1, br0, 07:29:17
K>* 10.2.0.0/24 [0/0] via 192.168.0.1, br0, 07:29:17
K>* 10.3.0.0/24 [0/0] via 192.168.0.1, br0, 07:29:17
C>* 123.123.123.96/27 is directly connected, vlan2, 07:29:17
K>* 127.0.0.0/8 [0/0] is directly connected, lo, 07:29:17
O   192.168.0.0/24 [110/10] is directly connected, br0, 07:29:17
C>* 192.168.0.0/24 is directly connected, br0, 07:29:17
C>* 192.168.45.0/24 is directly connected, wl0.1, 07:29:17
C>* 192.168.75.0/24 is directly connected, wl1.1, 07:29:17
AsusRouter# show ip ospf neighbors
% Unknown command: show ip ospf neighbors
AsusRouter# show ip ospf neighbor

Neighbor ID     Pri State           Dead Time Address         Interface            RXmtL RqstL DBsmL
192.168.0.1       1 Init/DROther      33.044s 192.168.0.1     br0:192.168.0.6          0     0     0
192.168.0.7       1 Init/DROther      35.801s 192.168.0.101   br0:192.168.0.6          0     0     0

AsusRouter# show run | sec ospf
% Unknown action 'sec'
% Unknown command: show run | sec ospf
AsusRouter#
AsusRouter#
AsusRouter#
AsusRouter# show run | include ospf
log file /var/log/ospf
router ospf
 ospf router-id 192.168.0.6
AsusRouter# show ip pr
prefix-list  protocol
AsusRouter# show ip protocol
VRF: default
Protocol    : route-map
------------------------
system      : none
kernel      : none
connected   : none
static      : none
rip         : none
ripng       : none
ospf        : none
ospf6       : none
isis        : none
bgp         : none
pim         : none
eigrp       : none
nhrp        : none
hsls        : none
olsr        : none
table       : none
ldp         : none
vnc         : none
vnc-direct  : none
vnc-rn      : none
bgp-direct  : none
bgp-direct-to-nve-groups  : none
babel       : none
sharp       : none
pbr         : none
bfd         : none
openfabric  : none
wildcard    : none
any         : none
AsusRouter#

Cisco 3750G:

mdscisco01#
mdscisco01#show ip protocols
*** IP Routing is NSF aware ***

Routing Protocol is "ospf 1"
  Outgoing update filter list for all interfaces is not set
  Incoming update filter list for all interfaces is not set
  Router ID 192.168.0.1
  Number of areas in this router is 1. 1 normal 0 stub 0 nssa
  Maximum path: 4
  Routing for Networks:
    10.0.0.1 0.0.0.0 area 0
    10.1.0.1 0.0.0.0 area 0
    10.2.0.1 0.0.0.0 area 0
    10.3.0.1 0.0.0.0 area 0
    192.168.0.1 0.0.0.0 area 0
  Routing Information Sources:
    Gateway         Distance      Last Update
    192.168.0.6          110      1d00h
    192.168.0.7          110      1d00h
  Distance: (default is 110)

mdscisco01#show ip route
Codes: 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

Gateway of last resort is 192.168.0.6 to network 0.0.0.0

     10.0.0.0/24 is subnetted, 1 subnets
C       10.0.0.0 is directly connected, Vlan2
C    192.168.0.0/24 is directly connected, Vlan1
S*   0.0.0.0/0 [1/0] via 192.168.0.6, Vlan1
mdscisco01#
mdscisco01#
mdscisco01#
mdscisco01#show ip ospf neighbors
                                ^
% Invalid input detected at '^' marker.

mdscisco01#show ip ospf neighbor

Neighbor ID     Pri   State           Dead Time   Address         Interface
192.168.0.7       1   EXCHANGE/BDR    00:00:37    192.168.0.101   Vlan1
mdscisco01#show run | sec ospf
                      ^
% Invalid input detected at '^' marker.

mdscisco01#show run | include ospf
router ospf 1
mdscisco01#

I'll disable and send the same output w/ the static routes disabled later on.  

Output wo/ static routes defined.  

 

Asus router:

AsusRouter# show ip route
Codes: K - kernel route, C - connected, S - static, R - RIP,
       O - OSPF, I - IS-IS, B - BGP, E - EIGRP, N - NHRP,
       T - Table, v - VNC, V - VNC-Direct, A - Babel, D - SHARP,
       F - PBR, f - OpenFabric,
       > - selected route, * - FIB route, q - queued route, r - rejected route

K>* 0.0.0.0/0 [0/0] via 123.123.123.97, vlan2, 00:04:49
C>* 123.123.123.96/27 is directly connected, vlan2, 00:04:49
K>* 127.0.0.0/8 [0/0] is directly connected, lo, 00:04:49
O   192.168.0.0/24 [110/10] is directly connected, br0, 00:04:49
C>* 192.168.0.0/24 is directly connected, br0, 00:04:49
C>* 192.168.45.0/24 is directly connected, wl0.1, 00:04:49
C>* 192.168.75.0/24 is directly connected, wl1.1, 00:04:49
AsusRouter# show ip ospf neighbor

Neighbor ID     Pri State           Dead Time Address         Interface            RXmtL RqstL DBsmL
192.168.0.1       1 Init/DROther      38.903s 192.168.0.1     br0:192.168.0.6          0     0     0
192.168.0.7       1 Init/DROther      35.388s 192.168.0.101   br0:192.168.0.6          0     0     0

AsusRouter# show run | include ospf
log file /var/log/ospf
router ospf
 ospf router-id 192.168.0.6
AsusRouter# show ip protocol
VRF: default
Protocol    : route-map
------------------------
system      : none
kernel      : none
connected   : none
static      : none
rip         : none
ripng       : none
ospf        : none
ospf6       : none
isis        : none
bgp         : none
pim         : none
eigrp       : none
nhrp        : none
hsls        : none
olsr        : none
table       : none
ldp         : none
vnc         : none
vnc-direct  : none
vnc-rn      : none
bgp-direct  : none
bgp-direct-to-nve-groups  : none
babel       : none
sharp       : none
pbr         : none
bfd         : none
openfabric  : none
wildcard    : none
any         : none
AsusRouter#

Cisco 3750G:

mdscisco01#
mdscisco01#
mdscisco01#show ip protocols
*** IP Routing is NSF aware ***

Routing Protocol is "ospf 1"
  Outgoing update filter list for all interfaces is not set
  Incoming update filter list for all interfaces is not set
  Router ID 192.168.0.1
  Number of areas in this router is 1. 1 normal 0 stub 0 nssa
  Maximum path: 4
  Routing for Networks:
    10.0.0.1 0.0.0.0 area 0
    10.1.0.1 0.0.0.0 area 0
    10.2.0.1 0.0.0.0 area 0
    10.3.0.1 0.0.0.0 area 0
    192.168.0.1 0.0.0.0 area 0
  Routing Information Sources:
    Gateway         Distance      Last Update
    192.168.0.6          110      1d00h
    192.168.0.7          110      1d01h
  Distance: (default is 110)

mdscisco01#show ip route
Codes: 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

Gateway of last resort is 192.168.0.6 to network 0.0.0.0

     10.0.0.0/24 is subnetted, 1 subnets
C       10.0.0.0 is directly connected, Vlan2
C    192.168.0.0/24 is directly connected, Vlan1
S*   0.0.0.0/0 [1/0] via 192.168.0.6, Vlan1
mdscisco01#show run | include ospf
router ospf 1
mdscisco01#
mdscisco01#show ip ospf neighbor

Neighbor ID     Pri   State           Dead Time   Address         Interface
192.168.0.7       1   EXCHANGE/BDR    00:00:36    192.168.0.101   Vlan1
mdscisco01#

 

 

Thx,

Hello

As you have continually changed you ip addressing its hard to keep track as to what you now have applied to the switchs and router, anyway looking at you most recent posts ospf adjacency haven't established so hence you dont have connectivity when you remove your static routes.

 

Asus

C>* 192.168.0.0/24 is directly connected, br0, 07:29:17

router ospf
ospf router-id 192.168.0.6

192.168.0.1 1 Init/DROther 33.044s 192.168.0.1 br0:192.168.0.6 0 0 0
192.168.0.7 1 Init/DROther 35.801s 192.168.0.101 br0:192.168.0.6 0 0

Switch

interface Vlan1
ip address 192.168.0.2 255.255.255.0 secondary
ip address 192.168.0.1 255.255.255.0

 

router ospf 1

log-adjacency-chang1es

network 10.0.0.1 0.0.0.0 area 0
network 10.1.0.1 0.0.0.0 area 0
network 10.2.0.1 0.0.0.0 area 0
network 10.3.0.1 0.0.0.0 area 0
network 192.168.0.1 0.0.0.0 area


S* 0.0.0.0/0 [1/0] via 192.168.0.6, Vlan1

 

192.168.0.7 1 EXCHANGE/BDR 00:00:36 192.168.0.101 Vlan1

 

So first of all make sure you have the correct ip addressing relating to the ospf config you've applied.

As for the adjacency, you need to make sure the ospf network types on both devices are the same.

sh ip ospf interface xx


As this is a switch connecting to a router you may have mtu mismatch between there interfaces which can be negated by applying the following:

int vlan 1
ip ospf mtu-ignore

Lastly run a debug to as to why the ospf adjacency isn't establishing 
debug ip ospf adj


Please rate and mark as an accepted solution if you have found any of the information provided useful.
This then could assist others on these forums to find a valuable answer and broadens the community’s global network.

Kind Regards
Paul

Ah, yes, right.  Since I thought everything was working now, I've added a third router to get my entire network on OSPF.  The original is still correct and hasn't changed but there is another router in the setup.  My topology is now as follows:

 

VLAN 1: 192.168.0.X / 24

VLAN 2: 10.0.0.X / 24

VLAN 3: 10.1.0.X / 24
VLAN 4: 10.2.0.X / 24

Asus Router: 192.168.0.6
Cisco 3750G: 192.168.0.1 w/ 192.168.0.2 as secondary.
Asus Router 2: 192.168.0.7


Server 1: 192.168.0.123 ( VLAN 1 )
Server 2: 10.0.0.72 ( VLAN 2 )
Server 3: 10.0.0.73 ( VLAN 2 )

KVM Virtual 1: 192.168.0.101 ( VLAN 1 - KVM Virtual Machine.  Actually curious why it even appears.  For the purpose of this scenario, you can think of it as residing on physical Server 1 above.  ) 

 

So the original is still as-it-was before, minus the additional router.  


Thx,
TK

Odd, that 101 IP is reported from that second Asus router's config but can't find that 192.168.0.101 IP is any of it's configs yet:

 

mdscisco01#sh log | include 101
09:11:29: OSPF: 192.168.0.7 address 192.168.0.101 on Vlan1 is dead, state DOWN
09:11:35: OSPF: Rcv hello from 192.168.0.7 area 0 from Vlan1 192.168.0.101
09:11:35: OSPF: Send immediate hello to nbr 192.168.0.7, src address 192.168.0.101, on Vlan1
09:11:35: OSPF: Send hello to 192.168.0.101 area 0 on Vlan1 from 192.168.0.1
09:11:45: OSPF: Rcv hello from 192.168.0.7 area 0 from Vlan1 192.168.0.101
mdscisco01#

Cleared up the VLAN 1 address on the cisco switch by reloading the device:

 

mdscisco01#sh ip ospf neighbor

Neighbor ID     Pri   State           Dead Time   Address         Interface
192.168.0.7       1   FULL/BDR        00:00:31    192.168.0.7     Vlan1
mdscisco01#

MTU looks ok.

Asus Router 2

1969/12/31 19:29:23 OSPF: ospf_write to 224.0.0.5, id 207, off 0, len 68, interface br0, mtu 1500:
1969/12/31 19:29:26 OSPF: Packet 192.168.0.1 [Hello:RECV]: Options *|-|-|EA|-|-|E|- vrf default

Asus Router

2019/12/08 13:30:05 OSPF: ospf_write to 224.0.0.5, id 50281, off 0, len 72, interface br0, mtu 1500:
2019/12/08 13:30:12 OSPF: Packet 192.168.0.7 [Hello:RECV]: Options *|-|-|-|-|-|E|- vrf default

Cisco 3750

mdscisco01#show system mtu

System MTU size is 1500 bytes
System Jumbo MTU size is 1500 bytes
Routing MTU size is 1500 bytes
mdscisco01#

However, the options are different, but that doesn't seem to make a difference:

 

Cisco 3750G

mdscisco01#show ip ospf database

            OSPF Router with ID (192.168.0.1) (Process ID 1)

                Router Link States (Area 0)

Link ID         ADV Router      Age         Seq#       Checksum Link count
192.168.0.1     192.168.0.1     517         0x80000008 0x006BF5 2
192.168.0.6     192.168.0.6     786         0x80000004 0x00A7DE 1
192.168.0.7     192.168.0.7     737         0x8000000B 0x0097E4 1

                Net Link States (Area 0)

Link ID         ADV Router      Age         Seq#       Checksum
192.168.0.7     192.168.0.7     737         0x80000004 0x007427

                Type-5 AS External Link States

Link ID         ADV Router      Age         Seq#       Checksum Tag
0.0.0.0         192.168.0.6     786         0x80000003 0x001344 0
0.0.0.0         192.168.0.7     787         0x80000008 0x00875A 0
123.123.123.96  192.168.0.6     786         0x80000003 0x0099E9 0
192.168.45.0    192.168.0.6     786         0x80000003 0x00D4E1 0
192.168.75.0    192.168.0.6     786         0x80000003 0x00890F 0
mdscisco01#
router ospf 1
 log-adjacency-changes
 network 10.0.0.1 0.0.0.0 area 0
 network 10.1.0.1 0.0.0.0 area 0
 network 10.2.0.1 0.0.0.0 area 0
 network 10.3.0.1 0.0.0.0 area 0
 network 192.168.0.1 0.0.0.0 area 0

 

Asus Router (192.168.0.6 )

AsusRouter# show ip ospf database

       OSPF Router with ID (192.168.0.6)

                Router Link States (Area 0.0.0.0)

Link ID         ADV Router      Age  Seq#       CkSum  Link count
192.168.0.1     192.168.0.1      929 0x80000007 0x6df4 2
192.168.0.6     192.168.0.6      856 0x80000007 0xe513 1
192.168.0.7     192.168.0.7      867 0x8000000b 0x97e4 1

                Net Link States (Area 0.0.0.0)

Link ID         ADV Router      Age  Seq#       CkSum
192.168.0.7     192.168.0.7      867 0x80000004 0x7427

                AS External Link States

Link ID         ADV Router      Age  Seq#       CkSum  Route
0.0.0.0         192.168.0.6      916 0x80000003 0x1344 E2 0.0.0.0/0 [0x0]
0.0.0.0         192.168.0.7      917 0x80000008 0x875a E2 0.0.0.0/0 [0x0]
123.123.123.96  192.168.0.6      916 0x80000003 0x99e9 E2 123.123.123.96/27 [0x0]
192.168.45.0    192.168.0.6       88 0x8000000c 0xc2ea E2 192.168.45.0/24 [0x0]
192.168.75.0    192.168.0.6       84 0x8000000b 0x7917 E2 192.168.75.0/24 [0x0]


AsusRouter#
router ospf
log-adjacency-changes
ospf router-id 192.168.0.6
network 10.0.0.1/24 area 0
network 10.1.0.1/24 area 0
network 10.2.0.1/24 area 0
network 10.3.0.1/24 area 0
network 192.168.0.1/24 area 0
#
redistribute kernel
redistribute connected
redistribute static
default-information originate
passive-interface lo
passive-interface br0:0
#
log file /var/log/ospf
hostname AsusRouter

Asus Router 2 ( 192.168.0.7 )

AsusRouter2# sh ip ospf database

       OSPF Router with ID (192.168.0.7)

                Router Link States (Area 0.0.0.0)

Link ID         ADV Router      Age  Seq#       CkSum  Link count
192.168.0.1     192.168.0.1     1072 0x80000008 0x6bf5 2
192.168.0.6     192.168.0.6     1341 0x80000004 0xa7de 1
192.168.0.7     192.168.0.7     1290 0x8000000b 0x97e4 1

                Net Link States (Area 0.0.0.0)

Link ID         ADV Router      Age  Seq#       CkSum
192.168.0.7     192.168.0.7     1290 0x80000004 0x7427

                AS External Link States

Link ID         ADV Router      Age  Seq#       CkSum  Route
0.0.0.0         192.168.0.6     1341 0x80000003 0x1344 E2 0.0.0.0/0 [0x0]
0.0.0.0         192.168.0.7     1340 0x80000008 0x875a E2 0.0.0.0/0 [0x0]
123.123.123.96  192.168.0.6     1341 0x80000003 0x99e9 E2 123.123.123.96/27 [0x0]
192.168.45.0    192.168.0.6     1341 0x80000003 0xd4e1 E2 192.168.45.0/24 [0x0]
192.168.75.0    192.168.0.6     1341 0x80000003 0x890f E2 192.168.75.0/24 [0x0]


AsusRouter2#
router ospf
log-adjacency-changes
ospf router-id 192.168.0.7
network 10.0.0.1/24 area 0
network 10.1.0.1/24 area 0
network 10.2.0.1/24 area 0
network 10.3.0.1/24 area 0
network 192.168.0.1/24 area 0
#
redistribute kernel
redistribute connected
redistribute static
default-information originate
passive-interface lo
passive-interface br0:0
#
log file /var/log/ospf
hostname AsusRouter2

 I'm including the third one but let's focus on the two:

AsusRouter
Cisco 3750G

 

@Tom  Hello,

 

could you change the configurations below?

From

10.0.0.1 0.0.0.0 area 0
10.1.0.1 0.0.0.0 area 0
10.2.0.1 0.0.0.0 area 0
10.3.0.1 0.0.0.0 area 0
192.168.0.1 0.0.0.0 area 0

To

10.0.0.0 0.0.0.255 area 0
10.1.0.0 0.0.0.255 area 0
10.2.0.0 0.0.0.255 area 0
10.3.0.0 0.0.0.255 area 0
192.168.0.0 0.0.0.255 area 0

And post here the result from

 

show ip protocols

show ip ospf neighbor

show ip ospf int bri

 

Regards,

 

Jaderson Pessoa
*** Rate All Helpful Responses ***

@Jaderson Pessoa 

 

Just saw this.  Let me try and post back.  

Adjusted as indicated, no effect.

mdscisco01#show ip protocols
*** IP Routing is NSF aware ***

Routing Protocol is "ospf 1"
  Outgoing update filter list for all interfaces is not set
  Incoming update filter list for all interfaces is not set
  Router ID 192.168.0.1
  Number of areas in this router is 1. 1 normal 0 stub 0 nssa
  Maximum path: 4
  Routing for Networks:
    10.0.0.0 0.0.0.255 area 0
    10.1.0.0 0.0.0.255 area 0
    10.2.0.0 0.0.0.255 area 0
    10.3.0.0 0.0.0.255 area 0
    192.168.0.0 0.0.0.255 area 0
  Routing Information Sources:
    Gateway         Distance      Last Update
    192.168.0.7          110      00:07:36
  Distance: (default is 110)

mdscisco01#show ip ospf neighbor

Neighbor ID     Pri   State           Dead Time   Address         Interface
192.168.0.7       1   FULL/DR         00:00:36    192.168.0.7     Vlan1
mdscisco01#show ip ospf int bri
Interface    PID   Area            IP Address/Mask    Cost  State Nbrs F/C
Vl1          1     0               192.168.0.1/24     1     BDR   1/1
Vl5          1     0               10.3.0.1/24        1     DOWN  0/0
Vl4          1     0               10.2.0.1/24        1     DOWN  0/0
Vl3          1     0               10.1.0.1/24        1     DOWN  0/0
Vl2          1     0               10.0.0.1/24        1     DR    0/0
mdscisco01#
mdscisco01#
mdscisco01#show ip ospf
mdscisco01#show ip ospf dat
mdscisco01#show ip ospf database

            OSPF Router with ID (192.168.0.1) (Process ID 1)

                Router Link States (Area 0)

Link ID         ADV Router      Age         Seq#       Checksum Link count
192.168.0.1     192.168.0.1     488         0x80000004 0x0073F1 2
192.168.0.6     192.168.0.6     3072        0x80000004 0x00A7DE 1
192.168.0.7     192.168.0.7     489         0x8000000E 0x0091E7 1

                Net Link States (Area 0)

Link ID         ADV Router      Age         Seq#       Checksum
192.168.0.7     192.168.0.7     489         0x80000006 0x007029

                Type-5 AS External Link States

Link ID         ADV Router      Age         Seq#       Checksum Tag
0.0.0.0         192.168.0.6     3072        0x80000003 0x001344 0
0.0.0.0         192.168.0.7     489         0x8000000A 0x00835C 0
123.123.123.96  192.168.0.6     3072        0x80000003 0x0099E9 0
192.168.45.0    192.168.0.6     3072        0x80000003 0x00D4E1 0
192.168.75.0    192.168.0.6     3072        0x80000003 0x00890F 0
mdscisco01#

Reading what this tag means on the Asus side:

redistribute static

Appears like it might be redistributing only single static routes?

ok ok.. now i understood what happens... try it.

 

interface vlan 2

ip ospf 1 area 0

 

interface vlan 3

ip ospf 1 area 0

 

interface vlan 4

ip ospf 1 area 0

 

interface vlan 5

ip ospf 1 area 0

 

and remove "networks" command under ospf, after it,  reset ospf proccess using " clear ip ospf process"

Jaderson Pessoa
*** Rate All Helpful Responses ***
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