Eigrp configuration example on nexus 7k switches below is the eigrp configuration example on nexus switches. In this lesson ill show you how to use a routemap to filter in and outbound route advertisements. Cisco nexus 7000 series nxos unicast routing command. How to filter prefixes with distributelist prefixes that are advertised by routing protocols like ospf, eigrp or rip can be filtered. For the number of supported eigrp instances, see the cisco nexus 9000. Changing the routing protocol in your network my blog. Eigrp by default uses multicast for neighbor discovery but it also allows you to configure eigrp neighbors statically. Cisco switchingrouting configure sub interface for nexus 7k. Eigrp supports filtering with accesslists and prefixlists but you can also use routemaps. Instead it is managed with the cisco ucs manager software.
Eigrp passive interface in eigrp and ospf the passive interface command stops sending outgoing hello packets,hence the router cannot form any neighbor relationship via the passive interface. It actually depends on the nxos version running on the switch and hence the switch model. In rip this command will disable sending multicast updates via a specific interface but will allow listening to incoming updates from other rip speaking neighbors. Mar 11, 20 whats new and exciting with eigrp enhanced interior gateway routing protocol. A vpc allows links that are physically connected to two different nexus 7000 switches to appear as a single portchannel by a.
A passive interface does not participate in eigrp adjacency, but the network address for the interface remains in the eigrp topology table. The first two use passive interfaces, and the third uses route redistribution. Because of this the first thing well have to do is check if the neighbor adjacency is working properly. State is passive, query origin flag is 1, 1 successors, fd is. Figure 724 flowchart for troubleshooting eigrp routeinstallation problems. Nexus 6004 eigrp relationship between the two switches. Eigrp nxos vs ios differences slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Troubleshooting cisco nexus switches and nxos cisco press. Basic configuration this weeks post will cover basic information gathering and configuration of cisco nexus switches. The passiveinterface command prevents a ripenabled router from sending broadcast and multicast rip updates out of a specific interface, a set of interfaces, or all routers interfaces.
Home eigrp eigrp named mode configuration tutorial. Hi folks, we all have used passive interface before, sometime to restrict the neighborship, some time to save link bandwidth etc. Alternate way for configuring eigrp on nxos netcraftsmen. An interface can only exist in one vdc and managed from that same vdc. Its reason for being is to simplify the eigrp configuration into one place, as previously with eigrp classic version the configuration was between the interface and the global process which made it harder to see all the configuration relating to. Note there is a side effect, the redistribution router will always prefer eigrp path due to lower eigrp ad. Jan 11, 20 cisco switchingrouting configure sub interface for nexus 7k. Cisco nexus 9000 series nxos unicast routing configuration. This behavior stops both outgoing and incoming routing updates to enable passive interface on one interface. Answer 3 enter no passive interface for interfaces connected to dsw1 under eigrp process or in interface f01 and f00, something like this note. Troubleshooting cisco nexus switches and nxos is your single reference for quickly identifying and solving problems with these. Eigrp has low usage of network resources during normal operation. Aci eigrp routing for external layer 3 connectivity.
This issues is resolved by setting eigrp ext ad to lower than ospf distance eigrp 90 100. Eigrp offset lists allow to add a value an offset to the calculated integer metric rdfd for a given prefix. We implemented vrfss virtual routing and forwarding instances on his edge mpls router and on his core nexus 7k to provide two separate routing instances. Join lazaro diaz for an indepth discussion in this video using the passive interface command, part of advanced cisco routing. Here eigrp is enable on the directly connected interface. Another thing we noticed was our license configuration was lost and we had to contact tac to reapply the l3 license. Configuring the enhanced interior gateway routing protocol variablelength subnet masking vlsm support eigrp is a classless routing protocol, which means that it advertises a subnet mask for each destination network.
I can doing and than configure subinterface but the interfacesubinterface didnt come up. However, i recently found that this is not the only way to configure eigrp on the nexus 7000. Aug 21, 2006 we have 2 3750s connected through routed interfaces on a fiber run. Eigrp notes with interview questions by shabeeribm. Passive interface one reason that route tables may not reflect the correct routes is due to the. How does the passive interface feature work in eigrp. There is a loopback interface on this device which has an ip address of 10.
Troubleshooting eigrp neighbor adjacency eigrp is an advanced distance vector routing protocol that has to establish a neighbor relationship before updates are sent. Unlike with ipv6 ospf, configuring ipv6 eigrp requires going directly in the routing process. See the cisco nexus 7000 series nxos interfaces configuration guide, release 5. After issuing the following into the 3750s, they cant establish neibor status. Page 18 manager, via the cisco nexus 2232 fabric extender platform, the cimc does not manage the server anymore. Nor am i able to learn even a default route from eigrp because the svis on the nexus cores are passive interfaces. The primary isp router isp1 has not been able to maintain adjacency since it was upgraded from a 3825 to a 3925. There is a switch that sits between the two isp routers and our 7ks. Passive interface rip,ospf and eigrp explained with. This is todays best single source for the techniques you need to troubleshoot problems with cisco nexus switches running the nxos operating system.
Cisco nexus 7000 series nxos command reference master. In this article, i will demonstrate some advanced configuration examples with eigrp on the cisco asa firewall. Hi all, im doing some labs, with eigrp and i have one issue, my configuration is very simple. In following discussion we will configure passive interface for rip distance vector routing, eigrp hybrid routing protocol. Cisco nexus 3548 switch nxos unicast routing command. I was going to run a test to make sure routing works. Ipv6 eigrp lab in this lab we demonstrate how to configure ipv6 eigrp. Help nexus 6004 eigrp relationship between the two. Though passive interface is available in all kind of routing protocol, their behavior differs from one to another. Interface will still receive and process those updates. A passive interface does not participate in eigrp adjacency but the network address for the interfacee remains in the eigrp topology table. One way of doing this is by using a distributelist. This lesson explains how the eigrp passive interface command disabled eigrp hello packets on the interface. Ccnp route study eigrp passive interfaces notthenetwork.
When you use the passive interface command for rip then it stops advertising rip routing updates on that interface. Mar 28, 2005 with eigrp running on a network, the passive interface command stops both outgoing and incoming routing updates, since the effect of the command causes the router to stop sending and receiving hello packets over an interface. Enhanced interior gateway routing protocol eigrp is a powerful distance vector routing protocol and is relatively easy to configure for basic networks. Eigrp named mode or multiaf mode is a new development in eigrp starting in version 15. So to begin youll learn what ipv6 command to launch, what component you need to specify as well as why you need to specify no shut down in the fast ethernet interface. After eigrp has chosen which interfaces to include it then decides which interfaces it will actively attempt to find neighbors and to exchange routing updates. Ill be using the 5500 series as my example and covering the basics without getting into features such as fibre channel, vsans and that sort of thing. Comprehensive coverage of the cisco nexus switches pdf. Eigrp configuration step by step guide this tutorial explains how to configure eigrp routing protocol in cisco routers step by step with practical example in packet tracer. If you continue browsing the site, you agree to the use of cookies on this website.
We know eigrp s update messages contain the following metric components cumulative delay, least bandwidth, load and reliability. Basically the 6509 has eigrp already 100, i want to create a vrf on this site with some vlans and matching subnets, and distribute it via eigrp to a partner whos also running eigrp on their nexus 7k 100. But even after careful consideration of all facts known to you at that time, you might get it wrong and have to change the routing protocol after the network has. I would highly recommend reading that article before proceeding further with this lab. Eigrp is an advanced distance vector routing protocol used extensively by enterprise customers. Create external routed network with following details.
First thing, lets get that loopback interface created. The issue is when i test the vlan 96 from the nx1 it goes via the correct interface. We have two nexus 7ks that are layer 2 adjacent to two isp mpls routers. Figure 725 shows the network setup for this case study. Cisco nexus 3548 switch nxos unicast routing command reference ol2785201 ip ospf passive interface 187 ip ospf priority 188 ip ospf retransmitinterval 189 ip ospf shutdown 190 ip ospf transmitdelay 191 ip passive interface eigrp 192 ip portunreachable 193 ip prefixlist 194 ip prefixlist description 196 ip proxyarp 197 ip rip. Eigrp passive interface configurations in description youtube. On r3, configure eigrp routing with an as id of 1 for all networks, disable the transmission of eigrp hello packets for the lan interface, and configure the bandwidth for s000 to 64 kbs.
Below is the ospf configuration example on nexus switches. On switch 1, enter the configuration mode for the router. When using the passive interface default on a router, to advertise networks you have to use the no passive interface vlan20, for example, what happens to the following network statements, are they ignored. Like other linkstate routing protocols, eigrp uses eigrp hello packets to establish relationships with neighboring eigrp routers. Although eigrp does not receive or send routing updates on an interface configured with the passive interface command, it includes the address of the interface in routing updates sent out of other non passive interfaces. How does this fit into the composite metrics concept.
For which the passive interface command prevents the exchange of routes on the interface. Prevents sending and receiving of routing updates on the passive interface. It is very popular because it is simple to deploy and support. Of all the interfaces chosen in the previous step it does not consider those that are passive to send hello messages. Eigrp or ospf, when you configure the routing, you are actually configuring an interface of the router for the routing protocol. Its my understanding that the passive command stops neighbor relationships from forming, but will continue to advertise the connected networks. You cannot manage an interface if it does not belong to that vdc. Configuring ospf passive interface free ccna workbook. The show ip protocols can be used to check if an interface is configured as passive.
However, there may be some other ways also, which i dont at the moment but if the eigrp k values are not same on the routers than neighbor ship is not possible as well. This example explains how to configure ipv6 eigrp on cisco ios routers and how to advertise two prefixes on loopback interfaces. Jul 12, 2008 passiveinterface command is used in all routing protocols to disable sending updates out from a specific interface. Nov 01, 2010 routergods eigrp passive interface default routergods. Router eigrp 100 passive interface fa00 ospf prevents sending of hello messages on a passive interface. If you have very many interfaces, you can use this command to have passive interface on all of them and then you can override it on each interface you want to remove the passive interface. What happen when we enable passive interface in eigrp. The ip ipv6 passiveinterface eigrp command suppresses. When eigrp fails to install routes in the routing table, the first thing to check is the topology table. We implemented vrfss virtual routing and forwarding instances on his edge mpls router and on his core nexus 7k to.
When it first came out, it was envisioned as more of a datacenter core as opposed to an overall network core. Also, what recommendation can you make in terms of books website to play around with this nexus devices. Eigrp enhanced interior gateway routing protocol important points about eigrp. Once you do this, eigrp will only use unicast and disables eigrp multicast on the selected interface this could be useful in certain scenarios where multicast is not supported or when you want to reduce the overhead of multicast traffic. Although the lab diagram shows router subinterfaces were using svis vlan596. Eigrp vrf adjacency issue between 6509e and nexus 7k. However, i recently found that this is not the only way to configure eigrp on the nexus. This lab will discuss and demonstrate the configuration and verification of eigrp passive interfaces.
The router does not form any relationship on the passive interface. Using vrfs in nxos compared to ios one of my customers is using mpls vpns from his service provider to support two separate divisions at his site. Here eigrp is enable on the directly connected interface between 7k switches. Configuring eigrp passive interface free ccna workbook. When you use it for ospf or eigrp, they wont send any hello packets anymore so that it becomes impossible to establish a neighbor adjacency on the passive interface. In this lab, you will configure eigrp for the topology and networks shown above. But within ospf, routes redistributed from eigrp will have a higher metric set with redistribution route map, therefore there is no risk of. Nov 19, 2017 eigrp passive interface using cisco packet tracer configurations router eigrp 100 passive interface g00 router eigrp 100 passive interface default. We use a vrf transit to connect the 10 gb interface to a pair of cisco nexus 6004 l3 switches running vpc.
See the cisco nexus 9000 series nxos interfaces configuration guide for more information. I am using the same network topology used in the previous article eigrp configuration basic on cisco asa firewall. This is a sample output of debug eigrp packet hello with the passive. A passive interface does not participate in eigrp adjacency but the network address for the interface remains in the eigrp topology table. First, you need to start eigrp with the ipv6 router eigrp command. May 19, 2011 thanks ruhann, i was wondering where one can get training materials for nexusos. I was able to kludge together a not very elegant solution by enabling routing on the 3650, adding an svi to one of the vlans and putting direct routes to. Lab configuring advanced eigrp for ipv4 features topology 2017 cisco andor its. The old network will be accessible via a leg between one of the nexus pair and a 7206vxr 172. Eigrp adjacencies will be established over fa00 only because fa01 is a passive interface, meaning that its network will be advertised but no eigrp packets will be exchanged over it.
Configuring eigrp passive interface there will be times where you want an interface to participate in eigrp but not establish neighbors on it. Bringing together content previously spread across multiple sources and cisco press titles, it presents uptotheminute featurelevel and architecturallevel information that is indispensable for troubleshooting nxos software and nexus hardware. Rightclick the eigrp interface and then select create eigrp interface policy with above task details. In eigrp just like in ospf, it is possible to set the default state of an interface as passive with the passive interface default command under the router eigrp configuration. To configure a passive interface for eigrp, use the following command in interface configuration mode. Here ospf is enable on the directly connected interface between 7k switches. Sep 15, 2014 there are two ways to prevent unwanted eigrp neighbors, one is using passive interface command and other is enabling eigrp authentication method. Learn how to disable eigrp from sending and processing received hellos on an interface which falls into a network statement using the passiveinterface. With eigrp running on a network, the passiveinterface command stops both outgoing and incoming routing updates, since the effect of the command causes the router to stop sending and receiving hello packets over an interface. We are replacing the existing network core with a nexus 9k pair. Changing the routing protocol in your network selecting the right ip routing protocol is one of the most important decisions in the network design phase.
The nexus series is a bit of a strange duck when it comes to this kind of thing. Disable the rip passive interface sun ethernet fabric. In this lab youll be configuring the lan interfaces on r4 and r5 as passive interfaces to ensure they do not form a neighbor relationship with each other however they must advertise the. May 12, 2015 deployment 02 eigrp passiveinterface cisco router with eigrp running on a network, the passive. This pdf is about comprehensive coverage of the cisco nexus switches pdf. Jun 19, 20 we have three options up our sleeve to achieve this. It was specifically designed for the most missioncritical deployments in the data center and on campus. R1 interface loopback0 ip passiveinterface eigrp nexus r2. Never too old nxos interface ranges may 5, 2014 john herbert cisco, networking 4 ciscos nxos the friendly face thats just like that old ios thing you used to know, but has enough little differences to trip you up constantly. Passive interfaces will still be advertised in other updates. The definitive deepdive guide to hardware and software troubleshooting on cisco nexus switches the cisco nexus platform and nxos switch operating system combine to deliver unprecedented speed, capacity, resilience, and flexibility in todays data center networks. This is explicitly explained in the ospf passive interface lesson found below, but not in the eigrp passive interface lesson. Troubleshooting eigrp route installation cisco press.
Although the pdf file for the command reference master index contains active. This chapter describes how to configure the enhanced interior gateway routing protocol eigrp on the cisco nxos device. Cscun03062 eigrp process needs to be restarted after nexus is reloaded we encountered this bug a few days ago when we had to reboot the nexus switches. Eigrp configuration advanced on cisco asa firewall. Troubleshooting eigrp neighbor adjacency networklessons. The cisco nexus 7000 series platform runs on cisco nxos software. Passive interface rip,ospf and eigrp explained with interview questions by shabeeribm passive interface command is used in all routing protocols to disable sending updates out from a specific interface. This is a sample output of debug eigrp packet hello with the passive interface command not configured for serial0. I see most data centers replacing some of the 6500 series with the nexus 7000 7010 and 7018, 5000 etcseries. Routergods eigrp passive interface default youtube. Virtual port channels, or vpcs, are another feature of the nexus 7000 switch. However the command behavior varies from one protocol to another.