Cisco WAN :: Nexus 5596U EIGRP Route Preference
May 9, 2012
I have a customer with a primary datacenter and DR datacenter, that has a P2P 100Mbps link connection between them. At the primary Datacenter there will be a Nexus 5596U with a L3 card running EIGRP, it will have three connections, one nothbound to the Internet not a problem, the other is north bound to an MPLS SP managed ISR router. Both datacenters will have MPLS SP managed ISR router, the MPLS service provider will be redistributing BGP into EIGRP from their ISR routers at both datacenters. This means we will learn external EIGRP routes with an AD of 170.
Connected to my 5596 southbound will be the SAN for the EMC storage traffic, the DR also has a SAN with EMC storage as well. The 100Mbps P2P link is primarily for replication traffic.
Since the Nexus 5596U with L3 module doesn't support PBR I have to figure a way for replication traffic to prefer the 100Mbps P2P link vs the MPLS cloud. I was thinking of running iBGP over the P2P link with the Nexus 5596 being a route reflector and it's iBGP peer which will be a Catalyst 3750X at the other end of the P2P link being the route-reflector client. That way both iBGP peers will exchanged learned routes.
I have to come up with a way for the replication traffic that comes sourced from the IP addresses of the EMC/storage to prefer the P2P link which will have an AD of 200 from iBGP in the routing table vs the external EIGRP traffic that has an AD of 170 in the routing table. All other traffic will route normally across the MPLS cloud. All other traffic will include client server traffic as there are application servers that sit south bound of the Nexus 5596, the client traffic will come inbound to the datacenter via the MPLS cloud.
I don't have a Nexus 5596 to do a mock lab. My thought is to redistributed connected with a route-map in EIGRP on the Nexus 5596 with a two match statements then set the IP next hop to the IP of the 3750X. I would need to select only replication traffic, so I was thinking if I can match on vlan and next-hop then my set command would be the next-hop of the 3750X.
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Dec 18, 2011
this is a Nexus 5596 L3 with the latest code:
It looks like the deny statement is not working as I can see all routes I am redistributing. I even did a deny on a specific route and I still see it in the routing table on another router in the autonomous system.The same below works fine on IOS platform. [code]
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Oct 13, 2012
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 :
router0 <==> router 1 <==> router2 <==> router3 <==> router <==>pc1
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Aug 8, 2012
We have problem con EIGRP and two ASR 1001 in High Availability. ASR2 have received all route (100 route) from PE, but in ASR1 doesnt received all route (75 route) from PE or from other ASR02. All PE have all route. The ASR1 when modify or lost some route dont update to the ASA. see diagram.
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Feb 26, 2012
I have an ASA 5520 connected to a Cisco 6509E, and we're turning up EIGRP between the two. The problem that I'm running into is that there a few static routes (including a 0.0.0.0) on the core that's being redistributed into the EIGRP AS, and I need to block this from being propagated to the ASA. The ASA only has the capability to use an ACL in conjunction with a distribute-list, and I can't find a way to filter the default route (0.0.0.0 /0), while allowing everything else.
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May 22, 2013
I have a mixed WAN environment with both eBGP and EIGRP routes. The BGP routes should always take precedence, when they exist. If no BGP routes exist I want the router to fail over to using the EIGRP routes. So far, this works fine.
The problem is, when the BGP route again becomes available (and the associated entry appears in the "sh ip bgp ... received-routes" output) the router is NOT relinquishing the EIGRP route. It remains in effect, showing as a "D" route int the route table even though there is a better ("B") route available. If I bounce EIGRP or the interface associated with it, the EIGRP route disappears and the BGP route reasserts itself, and everything will run correctly until the next time the BGP route disappears due to maintenance, line failure, etc.
My router is (C2900-UNIVERSALK9-M), Version 15.3(1)T
Here's the associated config
interface Tunnel101
description VPN backup WAN interface
bandwidth 7168
ip address 192.168.75.1 255.255.255.0
[code].....
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Mar 11, 2012
In EIGRP, if a router loses the successor to a route, and it has no FS, it goes active (starts asking all neighbors if they have a successor for that route).But if the neighbor did have a successor, shouldn't they have pro-actively told us about it when they learned it (so we already have it as the Feasible Successor?).
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Jun 20, 2012
I have a 3750 at a branch running EIGRP connected to two routers that both have configured:
access-list 1 deny 0.0.0.0
access-list 1 permit any
access-list 2 permit 0.0.0.0
access-list 2 deny any
router eigrp 1distribute-list 1 out FastEthernet0/0distribute-list 2 in FastEthernet0/0
Due to this recently applied config the switch become unreachable from the outside and cannot ping anything. Everything connected to it works fine. I was able to remote into it from a switch behind it and noticed that the 3750 has no default route in the routing table. I do see a default route in the eigrp topology table. How to make the switch learn a default route maintaining the existing configuration on the routers.
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Apr 26, 2012
I'm trying to create a route-map for an EIGRP Distribute list on a N7K, the goal is to not advertise a 10.0.0.0/8 and 172.31.30.20/32 networks out a link to a remote site while permitting all other traffic to the internet (default). I configured the ACL/route-maps below and applied them outbound on the N7K interface but no subnets at all are being received on the remote site router.
ip access-list DENY_10.0.0.0
10 permit ip any 10.244.244.20/30 <<--WAN interface network
20 deny ip any 10.0.0.0/8
25 deny ip any 172.31.30.20/32
30 permit ip any any
[code]....
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Feb 13, 2013
I'm attempting to redistribute a static route into EIGRP on a 3750 switch and pass it to an upstream router, sadly however this isn't working, or at least the route isn't being recieved on the upstream router. [code]
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Mar 11, 2012
We are deploying a new office in the building next to our main office. The main office has a Cisco ASA 5510 behind that is a Cisco 3750 stack. In the new office we are deploying a new Cisco 3750, they will be connected via fiber cable. I have sliced off VLAN 800 as a transit link /30 with an address space of 10.249.249.1-4. The new 3750 only has two VLAN's 800 and 112 (10.112.0.0/24). VLAN 112 routes are advertised to the neighboring 3750 properly as seen in the routing tables of the 3750 stack:
D 10.112.0.0/24 [90/3072] via 10.249.249.2, 00:22:24, Vlan800
Traffic passes between all local VLANS with no issue. I found in order to get packets to pass between the ASA and the new 3750 I had to add a static route to the ASA:
S 10.112.0.0 255.255.255.0 [1/0] via 10.100.0.1, inside
My question is why is EIGRP not advertising the 10.112.0.0 network to the ASA. Here are EIGRP configs on the switches
Existing 3750 Stack
router eigrp 100
network 10.0.0.0
redistribute static
[code]....
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Jun 8, 2011
Is it possible to track a IPSLA operation and if it goes down track a static route which will be removed from EIGRP process. I have read through documentation and have come stuck. I have the below configured and have shown the features installed. How would I go about getting the below static route injected into EIGRP only if the IPSLA operation in ok?
track RMB
type rtr 100 reachability
ipsla
[Code]....
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Feb 19, 2013
I have an issue with my setup of a 6500 switch (12.2(33)SXI9).We have a 6500 switch with several VRF's. For a certain VRF I would like to redistribute a static route in EIGRP. After doing so I don't see the static route on my eigrp neighbor.
This is a overview of my config. I'm basically redistributing only my static route for this vrf in eigrp.
I found a similar case in which the solution was adding a metric to the static route. (eg. redistribute static route-map static-eigrp-pp metric 10000 100 255 1 1500). But the strange thing is that we don't have this issue on a similar machine (same IOS, same config setup). [code]
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Mar 20, 2012
We have, for nearly 4 years, used EIGRP on our 6513 to make use of two unequal links to our branch offices. This worked because we could use the variance command and cause EIGRP to insert two routes into the table, one from each carrier. Thus it was we could balance the load to each one with a ratio similar to the ratio of the bandwidth of Link A to Link B.
We just purchased 2 Nexus 7010's to replace our single 6513 core.After much consternation we have found from our Ciscio SE that the Nexus 6.0.2 software rendition of EIGRP does not support variance.
Why would Cisco take their own propriatary protocol and then gut it by removing features? I'm quite ready to send these Nexus boxes back in favor of a newer 6500 series. MEC doesn't work like it is supposed to and the show-tech runs for over 24 hours without ever finishing (and this we can repeat on both boxes, multiple times).
We've opened a tac case but I just wondered for any work around for the 'variance' command?
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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.
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].....
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Mar 18, 2013
We have a Nexus 7010 running version 6.1(2).
I'd like to use IP SLAs and object tracking to define static routes for specific source/destination traffic across some WAN links we have. I've done this in IOS and it's worked fantastically, but I've not found where/how to do this on the Nexus 7010 platform (or any Nexus platform) as of yet. I could have sworn that this was going to be introduced in the 6.x code? Below is an example of how we do this in the IOS world:
track 11 ip sla 1 reachability
delay down 15 up 15
ip sla 1
[Code]....
Esentially this gives us the option of using a "failover" default route. I've attached a basic diagram to explain what we are trying to do with IP SLAs and object checking. The tracking should be configured against an SLA that uses icmp and the static routes should be configured against the tracking.
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Jan 23, 2013
I have 2 nexus 5000 switches configured with a trunk linking the two how can i do the follwoing
BOX 2
vrf context management
ip route 0.0.0.0/0 192.162.88.9
BOX 2
vrf context management
ip route 0.0.0.0/0 192.168.88.10
1. ping between the two boxes, i set up static route's but when i ping i get the error "NO ROUTE TO DESTINATION"
2. routing between the two
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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 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
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Sep 24, 2012
I've got two Nexus 7010's running HSRP north bound to a pair of ASA's, and BGP south bound to four 6509's. Is it possible to advertise default route to BGP neighbor (or prefer it via MED), only if the node is HSRP-active?
Essentially the goal is to create symmetry for inbound/outbound traffic. Only way I can think of so far is via an EEM script, so that when it sees HSRP go active via syslog, it would kick off an action to remove ASN prepend, or reduce MED, and the opposite if HSRP goes standby.
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Jan 3, 2012
I am working on Nexus 7010 with NX-OS 5.1.5. I have to delete the static route 10.10.0.0/16 via 10.16.0.21. [code] I try to remove the route with the command "no ip route 10.10.0.0/16 10.16.0.21" and I have the message below % Route not deleted, it does not exist..I don't understand why I have this message because the static route exist.
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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 10.165.101.192/28, 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
[code]....
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Oct 12, 2012
As you can see at the picture below i have 2 routers connected via two fastethernet links. Both routers running BGP. R1 (AS 65100) and R2 (AS65000).
R1 got a loopback interface with the IP address 1.1.1.1 255.255.255.255 R2 got two loopback interfaces 2.2.2.2 255.255.255.255 and 3.3.3.3 255.255.255.255.
Let's say that i want the host 3.3.3.3 to go over fa0/1 to reach 1.1.1.1 and rest of the network to go through fa0/0. What can I do to make this possible?
I know how to set Local Preference on an interface... but then all networks will take that specific path.
route-map LP_FA0/1 permit 10 set local-preference 200 neighbor 192.168.2.1 route-map LP_FA0/1 in
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Dec 19, 2011
I am currently looking to upgrade and extend my home network with preference to dual band and gigabit functionality. My problem is choosing the correct hardware.I want dual band to separate the network for the kids (a PC, laptop, Xbox 360 and phones all wireless) and set up parental controls and maintain connection speeds etc. For my needs I need the network to be connected to my Onkyo AV Amp (for internet radio and music streaming only), Blu-ray Player, Sky HD satellite box (all wired) and a PS3 (pref wired) and a few wireless devices all N capable. Apart from the obvious gaming capability I would like to be able to stream HD video to the PS3, PC (wired) and laptops via a USB HDD connected for now on an access point or modem router to save on the cost of having separate networked devices.
I currently have ADSL so I was looking to get a dual band gigabit modem router to serve the kids wireless hardware whilst my current hardware is on another floor and is connected with a wire from the existing modem but I have to keep swapping it from PS3 to amp etc.In short I am hoping to have a gigabit, dual band ADSL modem router and connect to a gigabit access point (with dual band if possible) via the cable I have sent to the other floor to wire up the 4 devices. I've currently been looking at Netgear and Buffalo solutions as I've had problems with Linksys and Belkin routers in the past. Would this be possible with just 2 devices (modem router and access point) whilst maintaining decent speeds and if so can someone shed some light as to what I should get.
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Nov 14, 2012
I have a problem on my catalyst 6509 on which I would like to do the following things :
I have some Vlans in which multicast is enabled.
In tose Vlan theres is a router which is default router for equipements.
I had enabled multicast routing because some Vlan needs to exchange multicast informations, but I wolud like to make difference between Multicast traffic. For example I have 5 vlans:
Vlan 1 and 2 need to exchange Multicast informations but the don't need multicast information from Vlan 3 and 4
Vlan 3 and 5 need to exchange Multicast informations but the don't need multicast information from Vlan 1 and 2
Vlan 5 is independant Vlan but doesn't need to have multicast information from all others vlan.
Last problem, equipement on differents vlan can use the same Mulkticast group address. In this case, Multicast routing is not working between Vlan 1 to Vlan 2 and Vlan 3 to Vlan 4.
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Jun 24, 2011
I'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.
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Feb 23, 2011
We are facing issue of continous packet discards On nexus4001L link (int po2) to Nexus5020 switch. Nexus4001L is installed in IBM blade center server and we have FCOE enabled in this setup. [code]
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Mar 15, 2013
I have been tasked to replace the existing Cat 6500 and 3750 switches by Nexus 7000 and Nexus 2000.I was told initially my boss plans to get 2 x Nexus 7000 and then eventually blow up to 4 x Nexus 7000s.For Nexus, is there a list of tasks / points that i need to consider for building the initial design?
Can i just link the Nexus 7000 like the following?
N7k-A ========= N7k-B
| |
lots of N2ks lots of N2ks
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Dec 22, 2011
Struggle to find the SNMP MIBS of the Nexus 5000 FEX tranceivers.
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Nov 13, 2012
we are planning a Nexus datacenter project with this layout:Our experiences with Nexus switches are not so large until now and the manuals are very extensive.Both N5K´s should be connected directly with all 4 N2K switches. I did not find a layout like this in the manuals. Only a design,where only 2 N2K are connected to one N5K, with this fex config:Now I´m not sure if it is right to make a config like this with the same slots and fex´s or with different slots and fex´s.
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Jun 15, 2012
I have a test on eigrp next week and have been doing it in packet tracer so i`m ready but i can`t seem to get EIGRP to work!I have 3 routers and the loopback interfaces are configured because there`s not enough PCs to actually connect up to the kit. [code]
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Aug 11, 2012
Does Cisco 861 have EIGRP support?
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Aug 25, 2011
We use all Cisco router in our business mostly 1841 and 871. But now i'm currently working with a new router:
Just purchased last week - Cisco 881
The Cisco IOS is:
Cisco IOS Software, C880 Software (C880DATA-UNIVERSALK9-M), Version 15.0(1)M6, RELEASE SOFTWARE (fc1)
->System image file is "flash:c880data-universalk9-mz.150-1.M6.bin"
As all our router are Cisco we use EIGRP as our routing protocal. But with this router all I see is:
#router ?
odr On Demand stub Routes
rip Routing Information Protocol (RIP)
Where is my EIGRP ? I can't configure eigrp, so my router wont be doing much routing.
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Jul 5, 2012
I have a issue in my network, i have 2 data connections with 2 different ISP (Principal & Backup connection). But with ISP "X" the RTO are stable (RTO 240), but with the ISP "Y" the RTO is in 5000 and the connection always are flapping.
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