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.
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.
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 220.127.116.11 release notes state the removal of SSH Server, however, I can not find any reference to it's existance prior to 18.104.22.168, did/does it exist in 22.214.171.124 and if so where? .
Screenshots are below and an extract from the configuration file for reference.
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 have a 1941 router configured for Policy based routing with two ISPs.Two static default routes configured to point the gateways of respoective ISPs with same metric.But the problem is, packets are going throug the one ISP only while doing traceroute.
ISP1-----> <----------------------> LAN1 | Router | ISP-------> <----------------------> LAN 2
Below is my configuration :
Current configuration : 5958 bytes ! ! Last configuration change at 05:18:56 UTC Mon Jun 25 2012 ! version 15.0 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption
We have two Cisco 3560E layer 3 switches at the core of our network. The switches are configured as an HSRP pair and the clients on our network point to the HSRP address as their default gateway. So if CORE-A dies, then CORE-B will pick up the address and the default route for the clients will continue to be available.We also need to specify a few static routes on the core switch to allow us to get to specific networks. Is there a way to do this so that the routes failover in the same way that the default gateway does?
I tried the "Advanced Routing" Feature over the RV-042 V3 Dual WAN VPN Router , And the New IP Subnet i added ( 10.0.7.0 ) in the Static Routing Table does NOT Appear in the Routing Table of the Router. Please review the attached Print Screen for both the Static Routing Entry Configuration & the Routing Table of the RV-042 Router.
I am using Cisco 2911 & IOS version is 15.1. My problem is that after some days (e.g. 15-20 days), the routing table suddenly stops updating & then I have to enter the default route again to make it up. I am using Track 1 to track default route here. After primary link goes down, the Track is also going down but after coming the primary link up, the track is not coming up. So, I have to add the default route again to make it up.
I am attempting to filter a specific host(s) from my OSPF routiing table on a ASA 5550 (ABR) using LSA prefix lists. However, when I look at the other routers in that area, I notice that ALL LSA type-3's are being removed (10 hosts are now missing from the routing table). I have verified the filter is working on the ABR, but I can't figure why ALL hosts/routes that were coming into the area are now being filtered instead of the specific one that I want to filter out.
Here is the config on the ABR:
prefix-list pdm_pl_000 seq 10 permit 126.96.36.199/32 ! ! router ospf 1 network 10.0.0.0 255.255.255.0 area 0 network 10.150.10.0 255.255.255.0 area 10 network 10.150.252.0 255.255.255.224 area 10
The 188.8.131.52 host is actually coming from Area '3'. Am I doing something that is removing all type-3 LSA's?
I'm learning about iptables, but I don't fully understand the chains of NAT table (prerouting, postrouting and output).I'm specially in doubt about prerouting and postrouting. As far as I know, DNAT can be made with prerouting and SNAT can be made with postrouting, so I think prerouting is for input and postrouting is for output, but the material I'm reading (and another sources) are not clear.
I have a pair of N5K's, down stream from them are from Fabric Interconnects and a UCS chassis. Upstream is a stack of 3750's then ASA5510's.
I am trying to backup the config to our TFTP server and I am getting 'no route to host'.. I tried to add a route, and found that N5K uses VRF's for routing?? .. After some looking I see there are two base VRF's 'management' and 'default'.. the management VRF has a default gateway entry and a single interface member (mgmt0).. when I look at the default VRF .. there are no interface members or routing entries.. Ok, I can handle that just add some interfaces and add a default gateway. Then I get lost:
I'm able to access the UCS manager..... so how the heck is that even possible if there's no gateway defined anywhere (or maybe I'm missing something?). My theory was: add all other ports but mgmt0 to the default VRF, and have the default gateway point out of the uplinks (a vPC).. but wasn't sure how that would affect anything and mainly just wanted to know how I was able to access the UCS manager in light of the fact that there is no default gateway anywhere that I could see...
However, the 6509 IOS only provides the option to track an interface. Is this a feature that's available in later IOS versions?
Is there another way to track these routes? The subnets are used for WAN links at a HQ and DR site and we are doing a specific PBR (sending all http/https traffic) using these subnets. If that WAN link goes down, we want to be able to utilize a backup WAN link to support that traffic.
I would like to configure few routings on my Cisco router 871 in order to allow my employees to have access only to specific websites.However, since some websites have dynamic IPs propably the route that I will create will not work.
My question is, can I configure a route or is there any other way to configure this permission based on the hostname/domain? For example, if I want to permit access to this website www.surveymonkey.com (184.108.40.206) instead of configuring:
ip route 220.127.116.11 255.255.255.255 192.168.10.250
is there any way to configure based on the url.. in order to be able to recognise this host correctly??
Im new to cisco routes, Im traing to configure a 1711 routes with a dsl 2wire routes, my problem is that Im able to ping anywhere in the routes, but when Im on my computer I can only ping the interfaces on the router but no the 2wire route that gives me access to the internet.
My computer is getting ip addres 192.168.200.100 when I ping th 192.168.1.76 is fine, but when I try to ping the 192.168.1.254 does not work, Im assuming the cisco has activated a dinamic route from .76 to .254, but it is not working, why?
Here is the router configuration
Router#show runBuilding configuration... Current configuration : 1183 bytes!version 12.3service timestamps debug datetime msecservice timestamps log datetime msecno service password-encryption!hostname Router!boot-start-markerboot-end-marker!!no aaa new-model!resource policy!memory-size iomem 25ip subnet-zero!!no ip dhcp [Code]....
6500 - version (s72033_rp-ENTSERVICESK9_WAN-M), Version 12.2(18)SXF17a.I have two ISP's. I have created two defaults as follow & secondary route does not work. [code] After disabling the interface to ISP1, backup routes does not work. [code]
I have a scenario which is fairly common - certain servers are accessed from the internet via a Load Balancer, and since seeing true client IP is a requirement, the return traffic path must go back through the load balancer. However, I do not want to route all traffic via the load balancer for obvious performance reasons. Internal traffic should be routed directly by the Layer 3 switch, which has a default route of a Firewall.
My plan is to use a VRF for the load balancer and any applicable servers, which works fine. But now I need to join the VRF's routing table with the switch's GRT (global routing table) so that internal traffic works. What is the best way to do this? For scalability reasons I'd like to avoid static routes and I see many examples using BGP, but in this case it seems overkill since everything is on a single logical switch. Can I use OSPF instead? Or a different method? The Supervisors will be 2Ts, so IOS 15.0 will likely be running.
How can I make sure R11 is able to get the OSPF routes of all the areas. Make sure area-278 does not receive any ospf routes from other areas as well as from ASBR routes from other areas. At the same tim, area-278 should be able send successfully RIP routes that we receive from R2 to backbone area.
Is there a way to set static routes per VLAN?Example VLAN 100 sends all traffic to 192.168.1.1 and VLAN 200 sends all traffic to 10.1.1.1. (2800 Series RTR)I have 5 networks that have their own gateway to the Internet via satellite link. Those networks run over the same infrastructure on separate VLANs. They frequently send traffic to each other, which gets sent over a slow SAT link. I introduced a router to the network and would like to set all my hosts default gateway to the local routers sub-interface then have a static route that send all traffic that is not on one of my 5 networks back to that VLANs respective SAT modem to get routed out over the Internet.
How filter inbound routes in Cisco ASA OSPF? Because Cisco ASA has no "distibute-list" command for OSFP process configuration, I try to use "filter-list" command in area definition. So, I try to use next configuration:
On a 4507 v12.2(20)EW, the connected subnets which are declared in the ospf instance are not propagated to the MPLS carrier router.Only the static routes which are redistributed in the ospf instance are propagated to the MPLS carrier router.
I have a Routing issue with one of my SG300-28P units. It has several Trunked VLANs. I think I habe Narrowed it down to a Default Route on the offending SG300 though I cannot see to change or delete any of the Static Routes on the unit. I can Add Routes with no issues, but once Added I cannot Edit or delete them.
I'm a bit perplexed atm with trying to set up multiple failover routes on a 2821 router. Let me say that I have more experieince in a switched network as routing is seldom required where I work atm. Here's my problem. I have a routing table set up as follows but only the primary routes work. The failover routes will not kick in once the primary route is not there.
ip route 10.32.11.0 255.255.255.0 18.104.22.168 ip route 10.32.11.0 255.255.255.0 22.214.171.124 100 ip route 10.32.12.0 255.255.255.0 126.96.36.199 ip route 10.32.12.0 255.255.255.0 188.8.131.52 100 ip route 10.32.14.0 255.255.255.0 184.108.40.206 ip route 10.32.14.0 255.255.255.0 220.127.116.11 100
Ip addresses are not exact but it gets the point across.
Why the failover routes are not failing over? The failover routes work if I remove the primary route from the config.
What are the rough figures that a NPE-G2 is able to hold for the BGP routing table?
378475 network entries using 51472600 bytes of memory 378482 path entries using 21194992 bytes of memory 63008/63003 BGP path/bestpath attribute entries using 8065024 bytes of memory BGP using 82975730 total bytes of memory
Are these 3 memories different memory allocated or are they are a sub-set of each other? If a NPE-G2 has 1GB RAM, does it mean that the routing table limit is depending on the RAM availability?