Cisco WAN :: AGFR01RTR03 / AGFR02RTR03 - Missing Route In OSPF To OSPF Redistribution?

Sep 22, 2011

I have 2 ASBR routers, AGFR01RTR03 and AGFR02RTR03, performing OSPF to OSPF redistribution in both ways for the same ***. They also do summarization for our private addressing scheme. It is all working just fine for that part (neighbors, summarization, redistribution). 
AGDC01RTR01 --- AGDC02RTR01 (OSPF 1000 ABRs)
          |                           |
          |                           |
AGFR01RTR03 --- AGFR02RTR03 (OSPF 1000 / 53 ASBRs)
Let's focus on AGDC01RTR01 with a specific entry here (IP subnet is fake) :
Routing entry for
  Known via "ospf 1000", distance 110, metric 300, type inter area
  Last update from on GigabitEthernet5/1, 1d03h ago
  Routing Descriptor Blocks:
  *, from, 1d03h ago, via GigabitEthernet5/1
Route metric is 300, traffic share count is 1


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Cisco WAN :: 3750 - ISIS OSPF Redistribution

Mar 27, 2013

We are currently running ISIS and recently we have purchased 2 WS-C3750X-24. Unfortunately 3750 do not support ISIS and we have decide to use redistribution between ISIS and OSPF. We are using Stack feature so consider 3750 as one chassis. 

Router A and Router B are ISIS neighbors. As first step we have setup redistribution between Router A and Switch 3750
Router A Configuration router isis
net 49.0000.0000.0000.0001.00
metric-style wide
[ code]...
Switch 3750 Configuration
router ospf 1
passive-interface Vlan3
[ code]...
From Router's A routing table we see the ospf routes life is good Switch routing table has E2 - OSPF external type 2 routes and is reachable from the rest of the network.
Router A #show ip route ospf 1 Gateway of last resort is not set O192.168.10.64/27 [110/2] via, 2d01h, GigabitEthernet1/20  [110/2] via, 2d00h, GigabitEthernet1/19 
When we bring up the ospf adjacency with Router B the whole ISIS routes are replaced with E2 - OSPF external type 2 which is not desirable.
Router B Configuration
router isis
net 49.0000.0000.0002.00
[ code]...

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Cisco WAN :: AS 300 Why Redistribution From OSPF To BGP Didn't Advertise O E2 Routes

Jan 9, 2012

I am facing two issues in BGP both the topology and Config files.Because the link between Vail and Telluride runs iBGP, both routers will learn about the networks in AS 300 and AS 400 through native BGP only and both AS's do reach each other. Both routers are also running OSPF with Aspen and BGP routes are redistributed into OSPF domain. Now, Aspen knows about the networks in AS 300 and AS 400. Now suppose the link between Vail and Telluride fails, both AS 300 and AS 400 can't reach each other anymore. The only solution to this is to redistribute OSPF routes to BGP on Vail and Telluride. But when i did this, only routes with "O" learned by Tahoe and Alta. In other words, Tahoe sees only, and Alta sees only the same routes. Why the redistribution from OSPF to BGP didn't advertise the O E2 routes?
This actually was discussed before but i still can't get it. It is not an actual issue.It is about "Syncronization". I know that we've said many times to turn on Sync. when we do redistribution from BGP to an IGP to make sure that the routes are installed correctly in the IGP routing table. However, as you notice in the configuration, i didn't enable Sync. on Vail and Telluride for a long time and redistribution still works fine.

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Cisco Switching/Routing :: SOHO RIPv2 Redistribution To OSPF On 2900?

Jul 27, 2012

I am having a problem reaching a soho linksys e1000 router through a second hop cisco 2900 router.Here is a brief topology of the network: I am using OSPF area 100 for all networks except for on R1 to E1000 which is RIPv2
R1 directly connects to R2 with a point-to-point serial on network /30 with ip
R1 directly connects to a a switchport using network /24 with ip
R3 directly connects to a switchport using network /25 with ip
R3 directly connects to a different cisco router using ethernet on network with ip
E1000 directly connects to a switchport using network /24 with ip

The switch has a vlan ip on /25?I can ping from R1 to E1000?I can ping from R3 to R1 I can't ping from R3 to E1000 ip route on R2 indicates that network is reachable via the serial connection on have redistributed rip to ospf area 100 and OSPF to RIP on R1?I am wondering why R1 can reach E1000 on network, and why R3 can reach R1s newtork, but R3 can't reach the E1000.There is an R2 router than can reach R1 and also cannot reach E1000, but I assume it's for the same reasons R3 can't, so I've omitted the remainder of that topology for this question.

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Cisco Switching/Routing :: Redistribution Of Statics Into OSPF On Nexus 7000

Feb 15, 2012

I'm looking to redistribute static routes in to OSPF on a Nexus 7k. To do this I'll be using a route-map with a match statement. My question is can you match routes using an ACL, a prefic-list or both. The reason that I ask is that in some docs I've read it states the following:
IP access lists—(For policy-based routing only). Match based on source or destination IP address, protocol, or QoS parameters. This tends to indicate that you can't use IP access lists for the match criteria for redistribution.

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Cisco Switching/Routing :: 3570 / Multi-process OSPF Redistribution And Failover?

Feb 7, 2013

I have two ospf processes running on a single 3570 edge router that has a dedicated transport circuit back to our network core. We are adding an additional "transport" only circuit into a new location that is also apart of the second ospf process backbone which will connect back to our core. There will also be a 3750 for this new circuit termination. Currently we are only redistributing ospf process 2 into ospf process 1 (1 = core backbone).

#router ospf 1
#redistribute ospf 2 subnet
We have no need to have ospf process 1 redistributed into the process 2 tables. That being said, when we add an additional transport ciruit, or path back to our core backbone, will this configuration present any issues with the redistribution process and failover.

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Cisco Switching/Routing :: Nexus 7010 - Stop Default Static Redistribution Into OSPF?

Sep 24, 2012

Ok I didn't setup my OSPF on my 7010. Today I found out that any static route I put into my 7010 gets sent into to my MPLS network. My 6509's you have to "Tag" the static rout for this to happen. Was under the impression the same was necessary for the 7010 or at least it had to "match" an access list. How can I fix the below so that by default all static routes are not resdistributed into OSPF?

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Cisco WAN :: VLAN 160 / 162 - Different OSPF Process ID For Interconnect Between 2 OSPF Domain

Mar 14, 2011

Currently the OSPF network consist of 2 segment route via static route.One is AREA 0 and another AREA 10.Both network are seperate entity, only static route to route between 2 networks.But the static route do not provide the dynamically and flexibility, I plan to run routing between 2 networks via VLAN160 and VLAN162.

I still want to manitnace it was 2 different OSPFrouting domain.Can I  run OSPF with differrent OSPF porcess ID?

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Cisco Switching/Routing :: 867VAE-K9 Is Missing OSPF?

Dec 12, 2012

I have a 867VAE-K9. On feature navigator it is listed as supporting OSPF. However when I go into config mode and type "router ?" BGP is there, but OSPF is not. Also, under my tunnel interfaces there is no support for any OSPF commands such as "ip ospf cost" etc. I'm in the process of raising a TAC. I have tried five or six different versions of IOS code that is available for this device, in each, we never see OSPF listed but sometimes see "router odr" or "router lisp"...

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Cisco :: OSPF On ASA Not Getting A Route?

Aug 29, 2012

why a subnet wouldn't be passed on to just one participating OSPF device?

I have two routers and an ASA, all of which are in area 0, it's a pretty simple config. The two routers are connected to some other devices (also in area 0) that pass of an external route to a particular subnet, let's call it The routers are getting it just fine, but the ASA is not:

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Cisco :: OSPF NSSA Default Route?

Jan 19, 2013

Looking through the SPROUTE course material they state on several occasions that an ABR will announce a default route in to a standard NSSA area, same as a stub area, because LSA5 external routes are not allowed.

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Cisco :: OSPF Route Propagation Over GRE Tunnel

Oct 16, 2012

Cisco device is neighbored up with a Brocade device via OSPF, and the desired routes are present.This Brocade device is neighbored up with another Brocade device via OSPF over a GRE tunnel. I am not seeing the desired routes present.What kinds of things can I look at to determine the issue? I think I've viewed the OSPF topology database (I'm not that familiar with Brocade) with the show ip ospf routes command and I'm not seeing the desired routes there either.There is no form of route filtering in place. I'll double check, but I do not believe there is any stub routing going on either.

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Cisco WAN :: 65199 Redistribute BGP Into OSPF Via Route-map

Nov 20, 2011

Our current router is setup to redistribute our BGP routes into OSPF using the following code:
-router ospf 60
-redistribute bgp 65199 metric 1500 metric-type 1 subnets
I want to filter down the routes so only a set of specific routes is redistributed.. we have done this in the past with EIGRP by doing a route-map / prefix-list to manage the routes passed into EIGRP.My question is I can replicate the metric and the metric-type in the route-map by doing the following: [code] Do I need to be concerned witht the "subnets" command in this design?  What I understand "Subnets".When redistributing routes into OSPF, only routes that are not subnetted are redistributed if the subnets keyword is not specified.  I suspect I need to add it!  So my final code should look like this..

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Cisco WAN :: 2811/ 3845 - OSPF Route Update

Feb 6, 2011

I m using ospf between HO and Branches for two links. branch router are 2811 and HO router 3845. when i enable ospf at branch i get all branch route like HO router and a default route. My requirement is each branch get only HO but no other branch. I have no default route.
I attached show ip route status for a  branch router.. Why default route comes and why all branch's route come ?

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Cisco WAN :: OSPF Route Between Nexus 7010 And ASR1002?

Sep 16, 2012

I cannot receive any OSPF route from Nexus to ASR1002 even they are both OSPF neighbour. I have attached the config for both, Both Nexus and ASR part of Area0.
ASR1002#sh ip ospf neighbor
Neighbor ID     Pri   State           Dead Time   Address         Interface10.165.117.12     1   FULL/BDR        00:00:35  GigabitEthernet0/0/0


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Cisco WAN :: 6509 OSPF Stays In Route Table

Apr 5, 2012

I have an MPLS router that connects to the core network.This router distributes (per route maps) routes from OSPF into BGP and from BGP into OSPF.The OSPF Process conencts a 6509 to the 7206 MPLS router. There are some routes in the OSPF process that I have filtered out of the 6509. They do not show up inthe 6509 at all and this is the only way they can be getting into the 7206.Checking the 6509 database, this route is gone, but it stays in the 7206 until I clear the route manually. The result is the route still gets distributed into MPLS. [code]

One thing to note, there are two possible OSPF paths the route gets into OSPF, one of them, the route is filtered with distribute-list on the 6509, which means it is still in the database, so it is still in the 7206 database, and still get distributed into BGP on the 7206, correct?

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Cisco WAN :: 2620XM OSPF Routes Are Not Populating In Ip Route Display

Nov 19, 2011

I have a Cisco 2620XM Router, running ver. 12.2 (7r). I have OSPF connected, however the OSPF routes are not populating in the sh ip route display. The  neighbor relationship is established. The sh ip ospf database does display the other routers running ospf, however only connected (C) and static (S) routes appear.

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Cisco Switching/Routing :: 3550 OSPF Default Route

Aug 19, 2012

I'm working on a little OSPF setup in my lab and having a problem pinging out to the internet.I have a setup with (3) 3550's running ip routing. I'm configuring OSPF but I can't ping the internet from any L3 switch except the switch with the actual uplink to the internet.[code] From SW2 and SW3, I can ping SW1 on all IPs (,, but I can't ping which is my gateway to the internet.

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Cisco Switching/Routing :: 3750 - How To Distribute Static Route Via OSPF

Mar 26, 2013

We have a 14 offfice MPLS network.  All offices have Cisco 3750s running OSPF which replicate route tables via our providers BGP peers.   I am introducing a new network in our SF office which is not directly connected so in SF we have a static route "ip route I want our other offices to learn this route route via OSPF so that they know how to get to the new network.  My problem is that of course remote sites do not see our static routes and i  have tried to add this via ospf but the switch will not propagate this route because it is not directly connected to the switch in SF.
router ospf 1
network area


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Cisco WAN :: 1921 OSPF To Two Routers Sending Default Route From Failover

May 28, 2013

Have a 1921 that has 3 eth connections (1 LAN, and 2 WAN) - I have 2 seperate OSPF processes (2 areas) on the WAN Ints - both upstream WAN's are sending defaults back to the 1921, and the 1921 is sending it's LAN range to them.
I have ip ospf cost 150 set on the "failover" WAN connection interface (Both on the 1921 and upstream), but the 1921 is preferring the default route from the "failover"?
The default routes are both being received by the 1921, but it's preferring the "failover" Int with the ip ospf cost 150 configured?

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Cisco Switching/Routing :: Nexus 7K Ignoring Received OSPF Route?

Mar 25, 2013

I have a Catalyst switch that is redistributing some static routes into OSPF. These are received on a Nexus 7K and appear in the database however the 7K does not add them to its routing table, one of the routes is ignored and not added. I haven't got a clue why this is happening.
The routes on the Catalyst are as follows with ID of
ip route
ip route
on the 7K the database shows:   1374       0x80001a44 0x1a48    0   1374       0x80001a45 0x6c5b    0
The routing table shows:
sh ip ro Route Table for VRF "default"'*' denotes best ucast next-hop'**' denotes best mcast next-hop'[x/y]' denotes [preference/metric], ubest/mbest: 1/0    *via, Po7, [110/20], 20w4d, ospf-NCC, type-2
sh ip ro Route Table for VRF "default"'*' denotes best ucast next-hop'**' denotes best mcast next-hop'[x/y]' denotes [preference/metric] Route not found

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Can OSPF V2 And OSPF V3 Run In The Same Time

May 15, 2011

I am running IPv4 with OSPFv2 currently. However, I planed to deploy IPv6 in my network. Is it possible to deploy V6 with OSPFv3 without affecting current network traffic in V4?

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Cisco Switching/Routing :: Nexus 7K Version 6.0(4) Route Redistribution (path Invalid)

Sep 6, 2012

Is there a known bug for Nexus 7K version 6.0(4) related to route redistribution?I have few vlan interfaces and being redistributed to the BGP.vlan interfaces are all up ang pingable.After configuring redistribution, vlan route is not in the bgp table.sho ip bgp is saying "path invalid" 
BGP routing table entry for, version 26302
Paths: (3 available, best #3)
Flags: (0x180c0021) on new-list, is not in urib, need resync with RIB, exported, has label
  vpn: version 47719, (0x100002) on xmit-list
  local label: 492294


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Cisco :: Does OSPF Cause Loops

Dec 6, 2012

What if i run ospf in all of the routers in network diagram ? does it caus loops ? if so how to prevent it ?

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Cisco :: Increase The TTL Of An OSPF Hello Packet?

Jul 12, 2012

Isn't there a way to increase the TTL of an OSPF Hello packet or am I thinking of a different protocol? Or is it only with virtual links? I can't seem to find it in my ROUTE cert book or on the Intarwebz outside of setting TTL security, but I could have sworn I remembered configuring something like this in my ROUTE lab book that I unfortunately do not have at work.

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Cisco :: Presenting Public IP To ASA Over OSPF?

Oct 29, 2012

I will be provided with /29 public IP address from my ISP. The idea is to run OSPF between ISP and my ASAs over private IPs so /29 is presented to ASA. This is because I will be using 5 out 6 available IPs on my ASA so I cannot use them on the routers.I need to run HA in Active/Standby mode on ASA, terminate site-to-site and remote access VPNs on ASA, and use static NAT for kit in DMZ network I am trying to figure out how to present this public IP range on ASA. Should I create two subinterfaces on physical interface towards OSPF area and assigned private IP address on one of them for OSPF and public IP on another and then setup a failover on each subinterface.

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Cisco :: Run An OSPF Protocol Over An ATM Connection?

Apr 25, 2013

I'm trying to run an OSPF protocol over an ATM connection: |----|

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Cisco :: Link Between Different Ospf Process ID

Dec 22, 2012

how would u link(or in other word route) different OSPF process ID? i have OSPF 1 and OSPF 2 and i want them to see each others can i accomplish this ?

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Cisco :: Backup WAN Connections With OSPF?

Feb 11, 2013

implement backup WAN links to complement the metro Ethernet links we currently use so we have some redundancy. These will most likely be a VPN over an Internet service but might be another Ethernet type service, the medium shouldn't really matter I wouldn't think. What I am looking for input on is what is the best way to implement this? Would I just set costs so that the backup is only used when the primary goes down, or should I create new OSPF area for the backup links?

Currently the core switches that are also our routers are 3750G stacks running ip services. We are getting ready to install new firewalls at each location that will become the gateways for the vlans currently on the core switches to give us much more control over segmentation, and because of this I am thinking that it may make sense to then move the OSPF instance from the core to the firewalls. In the drawing I did not show the access layer switches off of the core, and the MOE circuits actually terminate into a 3550-12T switch before the core. I think I will actually eliminate those 3550-12T switches and go straight into the core. This is a current state drawing, so does not include the backup links I am planning.

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Cisco Firewall :: Run OSPF In ASA 5520?

Aug 12, 2011

I have 10 different segments in ASA 5520, so i created 10 VLAN in ASA & made the inside interface as Trunk that connects with core switch. Now i need to run OSPF in the ASA.

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Cisco WAN :: Support For OSPF For 3560C

May 13, 2013

I am in the datasheets page for Cisco 3560C Compact switch and states that it ships with IP Base image that "includes the support for routed access, MACsec, and Open Shortest Path First (OSPF)"
Does this image come with the full fledged OSPF feature or is it a cut-down version of it?

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Cisco WAN :: 2821 OSPF WAN Routing

Dec 19, 2010

I will be getting a WAN connection to a few offices and I have a need to control routes recieved and advertised to/from them.  The service provider will be placing a CPE device on-site and will support OSPF with my edge router; in this case a Cisco 2821.  That 2821 router will ideally be configured with OSPF routing toward my two core switches.
-> C2821 to NOT have the full routing table from the Core switches
-> Only needs knowledge of two routes from the Core switches and routes from remote offices.
-> Controlled routing advertisements.  I do not control the remote offices and would like to ensure they do not accidentally advertise routes into my enviroment that could create a conflict.
I'm assuming the Service Provider will be running BGP on their CPE router, which will mean that the OSPF routes recieved by my Cisco 2821 edge router will be OSPF E2 routes.  So if thats the case the 2821 would need to advertise E2 routes.I'm not sure if I should be configuring the 2821 in Area 0...because its meant to be a WAN edge router; but if I configure it in another area...say 200...the Service Provider may configure his CPE router in Area 0...which I'm guessing would pose a problem as the 2821 would be lodged in between two area 0s?
From the reading I've done it sounds like I could use NSSA...but I'm not sure if this is the best design. 

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Cisco :: OSPF Within Tunnels In ASA5505 - ASA5510

Jun 27, 2011

I have 3 tunnels established (full mesh) with 3 CISCO ASA (all security+), through Internet : - Site A : ASA5510 - Site B&C : ASA5505, There is no main site or client site, each site has more than one network behind it. So I'd like to setup OSPF between all the ASA for them to exchange their route within the tunnel. I thought this was automatic when establishing the tunnel, but it isn't.

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