Cisco WAN :: 3825 Will Not Add Routes To Topology Table From Eigrp Neighbor
Mar 13, 2013
I have a 3825 running c3825-advipservicesk9-mz.124-24.T8. It is configured as an eigrp stub advertising only its connected and static routes. There are three WAN connections using a metro ethernet service. Two are data, one for voice traffic. The primary data connections run to two WAN edge ASR1002 routers.
The primary data connection (Gi0/1.943) is 20 Megs, the secondary data connection (Gi0/1.944) is only 15 Megs. Before the secondary connection was in place I only had routes to our backbone via Gi0/1.943 and everything was working great. Some time after the secondary data connection was turned up the routes to the backbone through Gi0/1.943 disappeared from the eigrp topology table causing all data traffic to flow through the less desirable secondary Gi0/1.944 interface to our backbone.
There is a good eigrp neighbor relationship between the 3825 and the ASR connected to Gi0/1.943, but if I show ip protocols it does not list the ASR as a data source. I know that the ASR is advertising its routes because I can see the updates coming from it if I debug ip eigrp. For some reason they are just not being added to the topology table by the 3825, not even as a feasible successor.
I have shut/no shut the interface multiple times at both ends during troubleshooting and I also reloaded and upgraded the code on the 3825 from 12.4(24)T to 12.4(24)T8. We also contacted the metro ethernet carrier to see if they had a policy that could potentially be blocking the traffic (no). My colleagues and I are just not seeing any feasible reason why these routes are not being added.
Is there a way in EIGRP to prefer external routes versus internal routes. EIGRP always picks up internal routes as long as they are available, no matter if external routes have better metric. Our Scenario is that we have DMVPN hub and spoke topology running EIGRP 101. The Core routers also on EIGRP 101 prefer EIGRP 101 routes. We have the new MPLS network running BGP and redistributing these BGP routes into EIGRP 101. The core routers prefer EIGRP 101 routes (internal) to redistributed BGP (external) routes.
I'm having problems with a linux box we're using as a VPN/IPtables firewall. The setup is such that we're sitting this thing behind a basic Comcast cable modem will all the pass through options set. The outside facing interface is set to DHCP and grabs an IP address from Comcast. Inside interface is statically set with the same being said for the CIPE interface. The inside interface works until we plug up the outside. When we plug up the outside interface, all network traffic to the box effectively shuts down and the /var/log/messages is flooded with "neighbor table overflow" messages. Sometimes, this takes a few seconds to appear, and when that happens I can track some traffic hitting the far side of the tunnel, I.E. it works for a few fleeting seconds.
I was called into look at a customers's site that was upgraded by another vendor. They were complaining about packet loss and performance issues. I discovered they had changed from static routing and turned on EIGRP (100) and the EIGRP neighbors are not on a common subnet, they used secondary IP addressing to connect two 4506 switches to the core router. Correct me if I'm wrong, but won't this cause the neighbors to bounce and cause the degraded network performance? Don't we need to have a single common subnet for this to work? Either that or they have bridged the VLANs somehow? There is also a cable connecting the 4506 switches besides the uplink to the core router.
4506#1
May 17 21:28:55.443: EIGRP-IPv4(100): Neighbor 192.168.120.1 not on common subnet for Vlan1 May 17 21:29:05.848: EIGRP-IPv4(100): Neighbor 10.102.10.10 not on common subnet for Vlan20 May 17 21:29:17.327: EIGRP-IPv4(100): Neighbor 206.78.xxx.xx not on common subnet for Vlan20 May 17 21:29:48.291: EIGRP-IPv4(100): Neighbor 206.78.xxx.x not on common subnet for Vlan30
I am working at a client site today on a routing issue. I am currently working on an issue where a 3750 switch running EIGRP will not update its neighbor router when a network statement is added to the eigrp instance.The neighbor is a 3825 router.
Both the switch and the router have a common network which is 192.168.36.0/24. Both the switch and the router are in a neighbor adjacency. Both boxes have "no auto-summ" in the routing configuration instance.
I can run debugs on both routers (debug eigrp packets) and then I can watch queries and updates when I issue "auto-summ" or "no auto-summ". Also I see a "graceful restart" for the peers when this is done.I had an expectation that when I added the network (this is just an arbitrary network for testing, which is 172.16.69.0/24). I wanted to watch this network being sent in an update to the neighbor router.When I add the above mentioned network, there are no updates packets sent from the 3750 to the 3845. I have not had success to this point trying to resolve. I have followed the Cisco document "Troubleshooting EIGRP Flow Chart", but have exhausted all it has to offer and now it is at the point where it is telling me to contact TAC.
I config the routers with EIGRP and also write Static route between two PC before remove the link between router0 and router1 , destination is reachable , but when remove this connection , packet from pc1 to pc0 will drop in a loop and never reach to destination , is it possible to have a Link state routing protocol and static route at the same network like this scenario , how to prevent loop in this topology static route is configure as bellow :
We have a BGP / OSPF configuration as shown in the topology picture. When the connection towards Internet is taken down, we expect the traffic to be forwarded toward WAN 2 (preferred) or WAN 1. The problem is that the BGP learned routes disappears when the Internet connection is taken down. The IP routing table on R2 only shows internal networks and the networks between R2 and WAN 1 and 2. No routes to internet is shown. We run "show ip bgp neighbors <ip-to-wan-1-router> received-routes" it contain internet routes. And when we run "show ip bgp neighbors <ip-to-wan-1-router> routes" it contains no routes at all.
i have a problem in my eigrp configuration that the other branch only see the network that i am advertised in eigrp and can't see the the redistibuted static route inside eigrp .. i dunno why is thatand that's my running.
We've put in a 3750 at our corp hq (Detroit). We did this to break up the current flat 172.16.0.0 /16 network into separate VLAN's for various purposes. We plan on doing that at another site (Farmington), which will become a DR site. We are running EIGRP throughout the organization over an OPTEMAN netowrk and also sending routes to a managed MPLS network which uses BGP. BGP redistributes into EIGRP and vice versa. I've attached a pdf of the network. The 3750 core at the corp hq is a temp core, hopefully upgrading to Nexus within a year or two. This problem didn't exist until the 3750 was introduced and became the gateway for the site. The OPTEMAN router was the gateway and was on the same VLAN as the MPLS router.
So, in detroit we have an Detroit-MPLS router, Detroit-3750, and Detroit-OPTEMAN. What I'm seeing is that the routers I'm getting from the MPLS router make it to the 3750. The 3750 advertises those routes to the Detroit-OPTEMAN router. However, the OPTEMAN router doesn't advertise these routes any further..
In Farmington, it is currently set up like Detroit used to be set up. There is a flat network and both routers are on the same VLAN, no L3 core switch. Routes come in from the MPLS, get advertised to the Farmington-OPTEMAN router, distributes the routes out to all OPTEMAN connected routers, including Detroit. However, Detroit is not passing that route to the 3750.
When we made the 3750 stack the core, we didn't change anything else, except for some IP changes. Why these routes aren't fully redistributing?
Detroit-3750 Stack WS-C3750G-24TS-S <-Stack master running c3750-ipservicesk9-mz.122-55.SE7.bin WS-C3750X-12S-E <-Running c3750e-universalk9-mz.122-55.SE7 show sdm prefer The current template is "desktop routing" template. [Code]...
My main issue was trying to connect virtuelly via GNS3 and my router setup on it. I have three Cisco 2621 XM routers set up. They all came with 2 Fast Ethernet ports. However, only one of them has a Serial port. So, what I'm doing is connecting the routers together with the fast ethernet ports using crossover cables. So, I baselined two routers to start with. Very simple AAA, set up IP HTTP server, IP HTTP Secure Server, etc. Privledge lvl 15 access, etc.
I then set my Router A's inside Fa0/1 port with a 192.168.1.0/24 network. The outside port Fa0/0 is 10.0.0.0/30 network.Router B is set up similar, 192. 168. 2. 0/24 insice Fa0/1, Fa0/0 is 10.0.0.0/30 network outside. So, three networks 192.168.1.0, 192.168.2.0, 10.0.0.0 network. [code] I then repeated the same on Router B, just transposing 2.0 network for interesting traffic, and Peer 10.0.0.2 for the Fa0/0 interface on Router A.When I "test" the tunnel, I get an error message. So, since I'm connected to Router B (which was working, had routing, and had Router A's network 1.0 in it's routing table), the error msg says that I need to add a route into the routing table (192.168.1.0). It was there up until I attempted to put the VPN in place. It's like it stopped the routing.
At face value, it looks like this should be working! But when I debug the ospf process, it looks like hello packets aren't tranversing across to the other side. Is it because I just have the 192.xxx.xxx.xxx networks as "interesting" traffic? Can I have multiple networks marked as "interesting"? I thought that's what the peer statements were doing to allow the tunnel to be established.
Is it possible to issue eigrp leaking routes on catalyst 6500 running IOS 12.2-33SXI9 on gigabitethernet interfaces? or is there another way to acomplish this?
I have a 3560 with IP base that is acting as a true EIGRP stub router today. It advertises local routes to the upstream service provider router and receives a default route.
Now I want to connect a 3900 ISR as a voice gateway. The 3560 does not seem to be advertising any routes to the 3900. Ok the EIGRP stub doc says this:
Only specified routes are propagated from the remote (stub) router. The router responds to queries for summaries, connected routes, redistributed static routes, external routes, and internal routes with the message "inaccessible." A router that is configured as a stub will send a special peer information packet to all neighboring routers to report its status as a stub router.
# Any neighbor that receives a packet informing it of the stub status will not query the stub router for any routes, and a router that has a stub peer will not query that peer. The stub router will depend on the distribution router to send the proper updates to all peers.
I guess I don't understand why the stub advertises local routes to the upstream ISP router but does not seem to advertise routes to the 3900. Does the stub identify the ISP router as the distribution router somehow, thus differentiating it from the 3900? If so, how is this done?
show ip eigrp neighbor detail on the 3900:
EIGRP-IPv4 Neighbors for AS(100) H Address Interface Hold Uptime SRTT RTO Q Seq (sec) (ms) Cnt Num
If a router receives EIGRP (AD90) routes, and is configured to redistribute thoes routes into BGP(AD20), why does the RIB show only the incoming EIGRP routes and not the redistributed bgp routes? Are redistributed routes considered for RIB entry in the router that is doing the redistribution
I have got two L3 switches, Cat3550 and Cat3560X. Cat3550 is present at head office and Cat3560X at the branch office. Both connected by 10MB LES link and have VLAN74.
I've been playing around with the Cisco RV180s for a while now and have come across a problem with the subnet calculation in the static routes and routing table. Essentially, if I configure up a static route for a /16 it's entered in the routing table as a /13. If I add a /24 it's entered in the routing table as a /16. I haven't tested every subnet size and combinations but this looks like a fairly fundamental maths bug.
As a side note, I notice that the 1.0.1.9 release notes state the removal of SSH Server, however, I can not find any reference to it's existance prior to 1.0.1.9, did/does it exist in 1.0.0.30 and if so where? .
Screenshots are below and an extract from the configuration file for reference.
We have small which I'm looking to implement and have built this on GNS3.
We have:
Router A in site 1 Router B in site 2 Router C in site 3
Router A and B are connection via a point to point 100M link and from Router C we have a 2 point to point one of which is 5Mpbs and going to Router A and Router B.
For Router C to reach Router A network it will go via Router B and these are 100M connection. When the link between Router A and B goes down. Router C should update and start using the 5m route.
For some reson, the routes are not updating. I have to do 'clea ip eigrp ne' for the routes to update and if I reload the routers all works well, it seems the problem is intermittent.
In datasheet of WS-SUP720-3B - link- was said that are only supported around 256K routes (fib?rib?).With this value I can't get 2 full bgp - that is around 850K ..
The supervisor is that control this or just memory ? I said this because I have a 7204-npe-g1 whith 2 fullrouting and 1G of and he are ok..
I renamed my SSID to "CoolWifiName" so that it's not the router's generic name, but what if a neighbor in my building uses that same name and uses it as their SSID? Since I wouldn't know which is which, and I mistakenly try to type in my wifi password on their's, would they have access to my password and be able to capture it?
Sometimes my wireless connection goes away.It just started doing this the last 2 months. I have to get next to my router in order for it to come back. My name will be in the list and so is my neighbors.
I have a neighbor, whom I barely know, (don't know his name even) ask if I would be willing to give him the number off of my modem so he can cannot wireless to my internet. I believe that is a bad idea. For one I don't know him but if it was possible and I did that, would he be able to access my account? or start more trouble? He at first said If I give him the numbers off of my router but then I stopped him because I have a modem not a router. So I would never let him but was curious if someone can tap into a signal of mine from a laptop next door to me using wireless signal? And if so can that person see all of my stuff? Would my computer and I be at risk?
I have a wireless PC laptop and a router that works fine. When I change rooms, there's competition from my neighbor's router and I want to remove it. When I "view wireless networks" I see their connection. When I go to "change the order of preferred networks" (hoping to delete it from there) it doesn't show up. If I go to "change advanced settings" I end up in the same place not showing the neighbor's wireless.
We have an existing network with OSPF configured between 3750's (DR and BDR) this is working fine.But the Nexus 7k which has been configured to run OSPF, won't established the adj. It is in the same network/subnet.The MTU is 1500.
I have 2 ASR routers running PIM-SM between them on several sub interfaces.PIM hello interval configured for 200ms.Sometimes PIM neighbors between ASR routers going down.
Reboot for each router not resolving the problem.Deleting ip pim sparse-mode and configuring it again on one of the ASR routers resolves the problem.
I didn't find any related bug.The version is asr1000rp1-adventerprisek9.03.06.01.S.152-2.S1.bin
We are about to a large amount of access points from access ports to trunks. Is there a report function in NCS that will give me a list of the APs and their CDP neighbor? I am able to view the information under "monitor/devices/access points" but I can't export that information to a useable format.
When I get the list the next step will be to create a configuration task in LMS 4.2 to configure the switch ports.
All is functioning but I can't connect to my roommates' wireless router.BUT I am able to connect to my neighbors' unsecured network without a problem. I also have a laptop that connects without a problem to it. The network is secured and I am definitely providing the correct network key/password. I compared the network settings on my desktop with the ones on my laptop and its the same.
our backbone (6509) is connected to atm backbone (nortel passport) those are connected through giga Ethernet interface and running ospf in area 0. One week ago we lost the ip connectivity between those backbones, the interfaces were in up but the neighbor relation fail and it was kept in LOADING STATE, according we the logs the neighbor relation fail because a BAD LSA was received (error messages %OSPF-4-ERRRCV:Bad LSU adv and %OSPF-4-BADLSATYPE:Invalid lsa:Bad LSA chksum Type 5 were received during the outage)We check in cisco and this is quite normal behavior if we receive a bad LSA but the customer is asking why we have the same error message for long time and we didn't lost the neighbor relationship.
how many bad lsa we can receive before to lost the neighbor relationship.We receive two errors messages for bag lsa.. [code]
I config my E0/0 Interface with "ip ospf network non-broadcast" command, I want this interface to use uni cast to hello neighbor.
As I issue "neighbor x.x.x.x" under ospf process, it told me that: OSPF: Neighbor command is allowed only on NBMA and point-to-multipoint networks. I am sure that there are no any typo, and show ip ospf interface e0/0 says it's been an NBMA interface, so what's wrong with this router?
IOS information: (C3620-J1S3-M), Version 12.3(18), RELEASE SOFTWARE (fc3)
We use our internet to watch Netflix. We have had no problems until recently, I called the satellite Internet company(which is a local co.) they told me my router was going out. I bought a new one, problem solved! Right?!? WRONG my husband told me my neighbor just got Internet and has been playing Xbox everyday which coincidently is between the 5:30pm to 10ish pm we have been having issues with our router. What can we do to fix this? Do I have to buy a bigger router? He is not stealing off mine because it is password protected that was changed when new router was setup and programmed. I have been running of a Cisco Linksys E2500 advanced dual band n router. The router is in the same room as the TV accessing it, which we previously had no issue connecting anywhere in the house or garage.
