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 192.168.4.0. The routers are getting it just fine, but the ASA is not:
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)
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AGFR01RTR03 --- AGFR02RTR03 (OSPF 1000 / 53 ASBRs)
Let's focus on AGDC01RTR01 with a specific entry here (IP subnet is fake) :
Routing entry for 1.1.1.0/25
Known via "ospf 1000", distance 110, metric 300, type inter area
Last update from 10.2.244.76 on GigabitEthernet5/1, 1d03h ago
Routing Descriptor Blocks:
* 10.2.244.76, from 10.2.1.249, 1d03h ago, via GigabitEthernet5/1
Route metric is 300, traffic share count is 1
[code]...
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.
View 8 Replies View RelatedCisco 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.
View 12 Replies View RelatedOur current router is setup to redistribute our BGP routes into OSPF using the following code:
-router ospf 60
-log-adjacency-changes
-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..
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 ?
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.
Config
ASR1002#sh ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface10.165.117.12 1 FULL/BDR 00:00:35 10.231.175.226 GigabitEthernet0/0/0
[Code].....
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?
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.
View 3 Replies View RelatedI'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 (192.168.1.90, 10.10.10.1, 10.10.10.5) but I can't ping 192.168.1.1 which is my gateway to the internet.
View 3 Replies View RelatedWe 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 172.16.20.0 255.255.255.0 192.168.100.1. 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
log-adjacency-changes
network 10.2.0.0 0.0.0.255 area 2.2.2.2
[Code]......
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?
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 172.30.255.22:
ip route 172.24.59.0 255.255.255.0 10.56.7.46
ip route 192.168.168.0 255.255.255.0 10.56.7.62
on the 7K the database shows:
172.24.59.0 172.30.255.22 1374 0x80001a44 0x1a48 0
192.168.168.0 172.30.255.22 1374 0x80001a45 0x6c5b 0
The routing table shows:
sh ip ro 172.24.59.0/24IP Route Table for VRF "default"'*' denotes best ucast next-hop'**' denotes best mcast next-hop'[x/y]' denotes [preference/metric]
172.24.59.0/24, ubest/mbest: 1/0 *via 172.30.253.10, Po7, [110/20], 20w4d, ospf-NCC, type-2
sh ip ro 192.168.168.0/24IP Route Table for VRF "default"'*' denotes best ucast next-hop'**' denotes best mcast next-hop'[x/y]' denotes [preference/metric] Route not found
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?
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?
View 7 Replies View RelatedI've enabled antispoof on all interfaces on asa 5510.If you start a traceroute to a network on the default route, everything works, since replies comes to an interface with route 0.0.0.0/0 defined.If you start a tracer route to a network that is NOT on the default route (let's assume coporate MPLS), you only get response from first carrier router, the other are discarded because of anti spoof violation.
I have ICMP inspection and icmp-error inspection enabled.
What if i run ospf in all of the routers in network diagram ? does it caus loops ? if so how to prevent it ?
View 8 Replies View RelatedIsn'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.
View 8 Replies View RelatedI 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.
View 4 Replies View RelatedI'm trying to run an OSPF protocol over an ATM connection:
192.168.80.0 |----10.0.0.1-----------10.0.0.2----| 192.168.50.0
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 networks...how can i accomplish this ?
View 7 Replies View Relatedimplement 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.
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.
View 1 Replies View RelatedI 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)"
[URL]
Does this image come with the full fledged OSPF feature or is it a cut-down version of it?
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.
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.
View 1 Replies View RelatedWhen you configure an ABR to inject a summary route into an area, what are the circumstances under which the ABR will inject the summary? I.e., since it's not a set of specific subnets learned directly from other OSPF routers, does the summary get injected regardless of what's in the routing table of the ABR?
I would imagine this could cause problems in a situation where there is an ABR injecting a large summary into an NSSA that also has a backup path over the Internet (IPsec tunnel or something). For example, if the area 0 routers from which the ABR receives routes went down, the ABR would continue to inject the summary route into the NSSA thus tricking those routers into sending traffic to the ABR rather than over the backup link.
I can't imagine any other way an ABR would decide when it's suitable to inject the summary though.
I have a simple isp topology built in GNS3, for testing (pppoe) dialers:cisco router(R1) connected to my pc network card, doing NAT translations for all the devices in the topology.I know how to configure NAT for spesific ip range, but i can't find out how to configure NAT for networks which are learned through ospf (or any other dynamic way).
View 2 Replies View RelatedI have an AS-external route being redistributed into OSPF from a static route on one of my routers. I recently changed the static route from a /24 to a /26 and all of a sudden the link ID of the segment in the OSPF database went from the network address to the broadcast address: Code:
View 5 Replies View RelatedI have 3 routers all running OSPF. each of the three routers have 2 networks they are advertising..NAT Overload breaks OSPF Adjacency
[code]...
OK. I think Im going crazy here. Im studying OSPF and I'm working on the DR/BDR election process. I have a topology where three devices (RIDs 1.1.1.1, 2.2.2.2, and 9.9.9.9) are on the same ethernet segment so they need to elect a DR. 9.9.9.9 is a switch and Im using a SVI for the OSPF interface. Van't get the darn thing to show up in the post but here is the topology.URl After OSPF came up, I noticed that router2 was selected as the DR and that switch1 was selected as the BDR. I thought initially that it was a matter of timing and that perhaps router2 just came up first and the slower SVI interface came up second. Shutdown the interfaces, cleared the OSPF process, and set the OSPF router priority on the VLAN interface to 10.
View 11 Replies View RelatedI have a scenario with a Cisco 6506 and a 7206. The 6506 is running BGP and peers with our data center router. The 7206 is a stub router off the 6506 and is used as an edge router for customer T1 circuits. I want to use OSPF between the routers to exchange connected and static routes. The problem I have is that static BGP null routes on the 6506 are overriding the OSPF routes being received from the 7206. Example: The 6506 is advertising a class C network 192.168.1.0/24 to our data center. The 6506 does not utilize the 192.168.1.0/24 network. It is only used on the 7206 for customer T1 circuits and is carved up into /29 subnets. So the 6506 has a static route: ip route 192.168.1.0 255.255.255.0 null 0. Today the routing is accomplished with static routes on the 6506 for the 192.168.1.0 networks on the 7206. Using OSPF the 7206 advertises /29 links back to the 6506, but when I withdraw one of the /29 static routes from the 6506, the /24 null route takes precedence over the more specific /29 routes and the traffic is black-holed on the 6506. how can I get the OSPF routes to look preferable to the /24 null route on the 6506?
View 7 Replies View RelatedDoes OSPF work between a VSS L3 MEC & an ASA Redundant Interface? Both 6509 are in VSS and a L3 MEC is formed to the ASA.Both ASA ports are a part of a L3 Redundant Interface. Please note there is only a single ASA in this topology. [code] Now, the OSPF neighboring does occur and go into the FULL state on this device, however soon enough, the state enters INIT/DROTHER state.But as soon as I disconnect the physical connection 6509(Standby) The OSPF adjacency goes into FULL mode.
View 5 Replies View Related