Cisco Switching/Routing :: Nexus 7010 - IP IGMP Snooping Querier
Sep 23, 2012
I've got a pair of Nexus 7010's running vPC. I am having a Multicast issue with a cluster of Linux servers that need to talk Multicast for cluster/high-availability operation. All the servers need to talk to a single multicast address and I am having trouble getting them to communicate. I believe I need to enable IP IGMP Snooping Querier on the N7K's and it needs to be enabled on the VLAN where the servers reside. How to enable IP IGMP Snooping Querier on a VLAN ?
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Nov 21, 2011
I useing Cisco861 : C861-universalk9-mz.124-24.T3.bin on my Cisco861 the command "ip pim dense-mode","ip igmp static-group "command does not exist,
router(config)# ip p?
port-map prefix-list
router(config)#
[Code]....
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Nov 28, 2012
how to configure igmp snooping on a 3560.
I have a pure L2 switching network and 2 hosts on the same vlan that want to communicate a protocol between each other using multicast packets.
I wanted to configure ip snooping only on this vlan and create a multicast group limited to only these 2 host ir order to make sure that the multicast traffic is only between both of them.
Since both are sender and receiver I´m not quite sure on how to configure this. In theory I also need to set an IP Multicast Address on the switch to where the hosts will send their multicast packets.
This is basically the network:
HOST_A---|SWITCH_A|==|SWITCH_B|---HOST_B
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Oct 10, 2012
In the following topology
R1(f0/0)------------(f0/1)SW1(f0/2)------------R2
R1 is configured as host (no ip routing) with ip igmp join 239.10.10.10 on fa0/0 and R2 with ip pim sparse-mode on f0/0. SW1 is a Catalyst 3560 running IOS 12.2(25)SEE4 working at Layer 2 only in this topology (VLAN 1).
I configured SW1 for igmp snooping:
ip igmp snooping
ip igmp snooping vlan 1
Basically, I can see 'snooped' muticast group (via IGMP reports sent by R1)
SW1#sh ip igmp snooping group
Vlan Group Type Version Port List
----------------------------------------------------------------
1 224.0.1.40 igmp v2 Fa0/2
1 239.10.10.10 igmp v2 Fa0/1, Fa0/2
SW1#
SW1#
SW1#
[code]....
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Nov 14, 2012
We have a 3750 acting as the core. By default IGMP snooping is enabled on cisco 3750 from the documents.but, when we see the ip mroute table on the switch, it doesnt show any output.
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Nov 24, 2011
Our switch model is "Cisco Catalyst Blade Switch 3020 for HP" We are building HA (High Availability) Databases infrastructure.Currently, there are two nodes(hosts- servers) and two above switch for HA.
Oracle said we need to turn off the IGMP Snooping in order to use the multicasting for their interconnect communication.So my question is:
Q1> Is there any way to use Multicasting without turning off IGMP Snooping on Switch side?
Q2> If 'yes', how can we configure the switch for Multicasting ?
Oracle uses 230.0.1.0 & 224.0.0.251 IPs with 42000 range port for Multicasting communication.
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Mar 22, 2012
I've been looking into IGMP snooping and have read that a L2 switch will forward multicast traffic to all ports connected to an interested receiver AND all mrouter ports. In a L2 'V' topology this results in all multicast traffic routed onto a VLAN being forwarded to the 2nd distribution switch. My question is how should a 6500 Sup720 deal with this unwanted multicast traffic? Both a Local SPAN of the RP and a Netdr capture suggest that this traffic is punted to the RP and ultimately dropped. Is this expected behavior or should the traffic be dropped in H/W?
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Feb 18, 2013
This is regarding Nexus core switch 7010. We are already running two nexus 7K with ten Nexus 5k. Currently we are going to add two new Nexus 5k in our DC. In the 7K we already running two VDC's.
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Jan 29, 2013
In our LAN network design, we have two Nexus 7010 switches on the core connected via vPC. Then LAN access switches are directly connected to the Core Nexus switches via regular port channels on the 3750's and vPC on Nexus. The core Nexus switches will be linked to an existing LAN network and the applications will be progressively migrated from the old to the new network.In this scenario, three VDCs are planned to be configured on the Nexus - One for the Interconnect (and WAN at a later stage), one for the LAN/local services and one for the building facilities/local services.
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Jun 11, 2013
I'm about to perform an upgrade on two Nexus 7010 switches per above. Can I directly upgrade or, do I need to go from version 4 to 5.x and then to 6??
SA7001# dir bootflash:
518 Jan 10 00:37:51 2008 TBM14107479_136878179.lic
15830 Jun 06 11:50:11 2013 dcnm-10.25.32.10-ckpnt.cfg
16384 Jan 09 23:25:25 2008 lost+found(code)
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Sep 19, 2012
We recently replaced our core switch from a non-cisco vendor with a Nexus 7010. With our old core switch, I had the ability to log changes to the ARP table. So if there was a dhcp conflict or a vMotion event, it would show up in the "show log" output. I've not found a way to do that with the Nexus switch - or at least no way to view the log. I have the command: logging level arp 6
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Aug 7, 2012
I have to upgrade a Nexus 7010 with dual Sup engines from 4.2(4) to 5.2 and am hoping it could be an ISSU. We are fine with an outage window.To upgrade from 4.2(4) to 5.2(5) I'll have to do a multi hop upgrade from 4.2(4) - 4.2(6) - 5.2(5) and each hop would take 40-60 minutes.do I spend 40-60 minutes for each hop, or just do a disruptive upgrade straight from 4.2(4) to 5.2(5)? Like I said, we are fine with an outage window.
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May 1, 2012
Does Cisco Nexus 7010 supports NAT64; the image that I am using is :-
Software
BIOS: version 3.22.0
kickstart: version 5.2(4)
system: version 5.2(4)
BIOS compile time: 02/20/10
kickstart image file is: bootflash:///n7000-s1-kickstart.5.2.4.bin
kickstart compile time: 12/25/2020 12:00:00 [03/08/2012 03:58:13]
system image file is: bootflash:///n7000-s1-dk9.5.2.4.bin
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Apr 11, 2012
I'm currently getting a Nexus hardware failure at present.
switch %MODULE-2-MOD_DIAG_FAIL: Module 8 reported failure due to DEVICE POST/DIAG FAILURE in device 48
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Dec 2, 2011
I just deployed a nexus 7010 switch at a server farm. after deployment, it was notices that there are surges in latency across the network. The default gateway was then moved to the nexus, with this pinging from an host on the same subnet there is intermitent burst is latency
NEXUS>>>>>Server
Ping of about 80ms and sometimes even times out.
To me, this is strange.
NX-OS Version is 5-02a
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Jan 6, 2013
I'm looking to see if it is possible to run a vPC between to vDC's on a single 7010? We have a Production setup that runs dual 7010's with vPC's between the chassis but in our lab we only have a single 7010 with a 32 port 10gig module. I was thinking that maybe we could create 4 vDC's on the 7010 and run a vPC between the vDC's.
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May 22, 2012
How to get a summary of netflow statistics on NX-OS? On IOS you could do sh ip cache flow which would show what I need? Can't find a similar command on the Nexus Platform.
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Sep 20, 2012
We will install a new Supervisor Engine in our Nexus 7010.One Supervisor Engine is already installed an 1Year old.So the Problem is that both Supervisor Engines may have different NX-OS version.Could this lead to a problem?Does the installed Supervisor Engine "udate" the newer Supervisor engine?
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Nov 24, 2012
i have a big problem because i configure a vlans with vrf and HSRP but, when i do "show hsrp brief", dont show this interfaces and, i can ping virtual IP. it seems hsrp dont work.
SWSERVSCAMILO_N7010_A#
interface Vlan405
description smsc-fwatlas1
no shutdown
[Code] ....
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Apr 28, 2013
We have a couple of Nexus 7010's split into Core and Distribution VDCs. MGMT0 interfaces on each of the Nexus VDC's (including the Admin VDC) are configured with different IP address, but on the same subnet i.e 10.10.10.1/24 for admin, 10.10.10.2/24 for Core and 10.10.10.3/24 for Distribution. The MGMT 0 physical port on each Nexus is connected to a physical gig port on a 3750 X switch, and the 3750X has uplinks back to the Nexus configured for vPC.
When i ssh to the VDC MGMT0 IPs from the 3750X, i can access each of these VDCs without any problems. But if i enable routing on each of these links(OSPF) and advertise it to the WAN, i cannot see these routes advertised and also cannot see any of these routes in the local routing table.Just wondering if i have to enable these links on a VLAN and then advertise it to the WAN..But if this the case, VLANs cannot be created on the Admin(default VDC).
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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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Jan 19, 2013
I am facing issue with nexus 7010 login authentication by radius server. I have two nexus 7010, one of them is working perfectly. Other taking long time to authenticate. If i use local database to login it works perfectly. It works fine also if i login from console using radius for authentication.
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Apr 9, 2010
Does the nexus 7010 support virtual switching yet? All of the posts I have found from about a year ago say that it is going to be supported, but there were no dates listed. I heard the same thing from Cisco a while back, but haven't followed up with it.If it is supported finally are there any configuration guides available for it?
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Feb 16, 2011
you find attached my network architecture with 2 Nexus 7010 on core layer and 2 Nexus 5020 on distribution layer, each one with 1 N2148T fabric extender switch. PC-A1 and PC-A2 are connected to one N2148T, PC-B1 is connected to the other N2148T. Nexus-7000-1 is HSRP Active for all VLANs, Nexus-7000-2 is HSRP standby. PC-A1 and PC-A2 are connected to VLAN A, PC-B1 is connected to VLAN B. PC-A1 and PC-A2 have the same default gateway correspondent to IP HSRP on VLAN A. It happens that PC-A1 is able to ping PC-B1 while PC-A2 is unable to ping PC-B1. If I issue a traceroute from PC-A2 I see Nexus-7000-2’s physical IP address as the first hop even if Nexus-7000-2 is HSRP standby. After the first hop the traceroute is lost. If I shutdown Port-channel 20 on Nexus-5000-2, PC-A2 starts to ping PC-B1.I can’t understand what’s wrong in this architecture.
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Sep 14, 2010
I've configured ip dhcp snooping on several vlans I want to monitor and the binding table doesn't seem to be building.eature DHCP is on, global ip dhcp snooping is enabled, VLAN snooping is enabled on the vlan's I want to monitor and my trusted interfaces are also configured. Alas no binding entries in the table! 7K is running 4.2(6).
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Jun 4, 2012
I use Nexus 7010 as our layer 3 router.I have ssh feature turned on so I can manage it from the management interface. I just found out that users can use putty to ssh to the local SVI interface of the NEXUS. Although they still need username and password to login but we dont want them even able to bring up the welcome screen.Example, user's IP is : 172.16.25.100 , they can ssh to 172.16.25.1 which is the NX SVI interface.
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Jul 5, 2012
I believe i've enable jumbo frames on our Nexus 7010, one in each data-centre.
system jumbomtu 9216. Also on the interfaces mtu 9216. And can see MTU 9216 bytes, BW 20000000 Kbit, DLY 10 usec on the port-channel between them. Though when i ping between vlans at each site with large packets i get 30% drops and if i set the DF bit in IP header to yes - 100% loss.
8798 bytes from 10.200.12.2: icmp_seq=19 ttl=254 time=8.024 ms --- 10.200.12.2 ping statistics ---20 packets transmitted, 14 packets received, 30.00% packet loss
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Mar 30, 2012
I have a senario where i'm going to have 2 Nexus 7010 connected as a core, and i'm going to have 4 5510's connected in a star formation. Each nexus 5510 will connect to the nexus core Via two 10Gb links. Each nexus 5510 will have 2 links attached to The core switches in vPc's.
Nexus 7010-1 = Core 1
Nexus 7010-2 = Core 2
Nexus 5510-1 = vPC = 100 2 Ports in vPc 100 -- > 7010-1, 7010-2
Nexus 5510-2 = vPC = 200 2 Ports in vPC 200 -- > 7010-1, 7010-2
Nexus 5510-3 = vPC = 100 2 Ports in vPc 300 -- > 7010-1, 7010-2
Nexus 5510-4 = vPC = 200 2 Ports in vPC 400 -- > 7010-1, 7010-2
The way I intend to configure the vPC's is this the best way. If i get a vPC dual active scenario what would happen. All ports will be forwarding all VLAN traffic this is how I intend to have it work.
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Jul 10, 2012
Yesterday I configured the 7010 Nexus switch. I created a VDC and allocated few ports and configured VLAN for testing. After enabling feature interface-vlan i was allowed to configured L3 interface for the vlan. I assigned ip address and connected few server to check the reachability but it says Destination Host Unreachable.
NX OS Ver : n7000-s1-dk9.5.2.4.bin
Configuration of the VDC below.
feature telnet
feature udld
feature interface-vlan
feature lacp
[Code]....
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Mar 25, 2012
I have an environment where i have two nexus 7010 switches, along with 2 nexus 5510's. I need to run OSPF as a layer 3 routing protocol between the vpc peer links. I have 1 link being used as a keep alive link, and 3 other links being used as a VpC link.
1) Is it best to configure a separate Vpc VLAN i.e 1010
2) Is it best to configure a vrf context keep-alive
3) just have the management address as the peer ip's.
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Sep 25, 2011
I have to deploy a full IP-TV solution and the IGMP snooping must be supported on the switch.
I know the the ESW 520 support this protocol but the full IP-TV solution will manage uo to 200 set up boxes, does this switch support all this traffic?
I also have another question, what exactly mean "Combo SFP slots include one 10/100/1000BASE-T Ethernet port and 1 SFP-based Gigabit Ethernet slot for fiber, 1 port active at a time." ? Is when I use 1 port with LX sfp transcever the 3 other uplink ports will be inactive and I can't add another or trunk it with another switch?
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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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Jan 25, 2012
I am sure that F1 linecards on Nexus weren’t able to support L3 functionality, so my query is does the F2 linecard (N7k-F248XP-25) on Nexus 7010 support Layer 3?
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