Cisco Switching/Routing :: 2911 Multicast Traffic Stops Flowing?
May 7, 2012
I have configured multicast(ip pim dense-mode) on two 2911 that are connected by a Multilink( 3 Mbps) Wan connection.The configuration works fine for awhile and sometimes all day but at some point one of the Multilink interfaces stops passing multicast traffic.I perform a SH Multilink 1 on the interfaces and one show multicast packets incrementing and one does not, it just stops.The problem acts like there is a buffer that gets full and after that happens it just stops working.
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May 8, 2012
I have configured multicast (ip pim dense-mode) on two 2911 routers that are connected by a Multilink (3Mbps) Wan connection.The configuration work fine for awhile and sometimes all day but at some point one of the Multilink interfaces stop passing multicast traffic.I perform a sh multilink 1 on the interfaces and one interfaces show the multicast packets incrementing and the other does not, it just stops.The only fix for this is to hard reboot both routers and the multicast traffic begins to flow once again.
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Jan 16, 2013
We are in the process of rolling out iPads to our offices. As part of this implementation, we need to print from the iPads to our network printers. Our network printers are mostly HP and Xerox and do not have native Apple AirPrint capabilities. As such, we have been using the FingerPrint software to share out the network printers as Apple AirPrint printers. We have a mixture of switches at our offices. Most offices utilize a 3550 PoE switch. In these offices the AirPrint traffic is being transferred successfully and everything works great. In the offices which are using 3560 PoE switches, the traffic is never seen at the iPads. We are using EnGenius EAP300 access points connected into the Cisco switches to provide wireless access to the iPads. Both 3550 and 3560 switches are running iOS 12.2(25). What might be stopping/blocking the AirPrint traffic on the 3560 switches?
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Feb 18, 2013
I have a 3560X switch with interfaces 36-48 on the same LAN. All interfaces are switchports. Hosts on 38, 39 and 40 are multicast senders: all sending to the same single multicast address. Hosts on 36 and 37 are receivers, having joined that multicast group. I created an SVI for the LAN and put it in ip pim passive. (That is the only PIM mode allowed for an SVI with my IOS.) Show ip igmp snooping groups shows that 36 and 37 are the only interfaces in this group. I attach a laptop to interface 42 and Wireshark, and the laptop is receiving the multicast traffic. The laptop does not join the group. I expect it would not see the traffic.
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Jan 16, 2012
does 6500 with SUP-720 support nat on multicast traffic?
i know it support Multicast service reflection based on SXI4 which can facilitate me on destination address nat.
but if i need only source nat, does the defualt NAT feature supported on multicast traffic ?
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Dec 20, 2012
I am trying to resolve a situation where we need to send multiple (2 atleast) multicast feeds from a source to our multilayer switch (3560x).
The problem with the source is that it can only send a feed to a single switch at a given time. It can not send 2 (identical) feeds to two 3560x devices (on 2 different subnets/vlans). I was wondering if i could make the two 3560x devices appear as 1 device (using virtual chassis system or a similar feature). I am running ip services IOS feature set (c3560e-universalk9-mz.122-58.SE2.bin).
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Dec 6, 2012
Attached setup i am planning for testing multicast output from different vendors using VLC and STB. This Setup made to test the picture quality between the vendors at the same time on the multi viewer screen.
1) Only a 2960 Gig port switch with only one L2 v lan with IGMP snooping enabled.
In this scenario where Source and receivers are in the same L2 v lan ( no L3 interface is involved) hope i would able to test all the multicast sources with out any additional configuration on the Cisco switch.
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Jan 12, 2012
I am having trouble getting some multicast traffic across a link. I have a 3750G setup, with IP routing and IP multicast routing, between two laptops. This will eventually sit between two networks that cannot be physically connected to each other for security reasons. I have static joins on the ports but cannot see the multicast traffic on the receiver. I am attaching the latest config. The sender(10.10.4.2) sits on gi1/0/24 and the receiver(10.10.3.2) sits on gi1/0/1. I am using VLC to test this and it will connect if I point the receiver to the address of the sender, but will not receive any multicast. The multicast traffic is not making it to the 10.10.3 side, I used wire shark to verify that it was not making it across.
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Oct 3, 2010
We've got a cisco 2821 router which periodically stops routing all traffic. It seems to happen about once every 2 weeks, and I can't find anything that could be causing it. There are no entries in the log and the router stays up and running but requires a restart to begin processing traffic again. We're running 12.4(13r)T11.Any thoughts, or troubleshooting steps to track this down?
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Aug 8, 2012
Multicasting. The configuration is I have a 6506 as my core switch receiving multicasts from an interface assigned to VLAN10. I have a monitor port setup with a PC running Observer which says multicasts are being received on the core switch. On a different interface on the core switch I have a 2960G switch connected to it and this interface is on VLAN 10. The 2960G switch has a workstation connected to it that needs to receive the multicasts. How do I configure the 6506 and/or the 2960G to process the multicast traffic?
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Nov 30, 2009
I have two Catalyst 6506 in VSS mode with VS-S720-10G running 12.2(33)SXI1 IP SERVICES.I have two firewalls that communicate on to the other through a dedicated VLAN created on Catalyst 6506.
One firewall is able to ping the other one on this dedicated VLAN but if I send multicast traffic from firewall-1 I didn't receive it on firewall-2.I found a bug related to multicast issues on Cisco WS-C6509-E with VS-S720-10G. The bug ID is CSCtc59038.
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Nov 15, 2011
I have a 2911 router. One interface is configured external (WAN) and two interfaces are configured on separate internal private subnets. What is the configuration to allow all traffic in both directions between the two internal subnets?
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Feb 21, 2013
’m somewhat new to Cisco routers this is my first attempt at getting one to work. I work in an environment with multiple locations, most are using the Cisco Model: 2911/K9 or the Model: 2921/K9 routers running IOS Version 15.0.We just added a new small office and all I had in the way of a router was a Cisco C1841-IPBASE-M router, running IOS Version 12.4.When setting up the C1841 I kept the configuration pretty much the same as the others allowing for the differences in the OS. I can remote into the 0/0 (outside port) from over the network, I can ping to that port without fail, but I can’t send or receive traffic from the 0/1 (inside port).
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Feb 5, 2013
I am trying to connect a Control network that can not have access to the Internet, or any other network for that matter, to my Admin network so that I can retrieve trend data about the plant that goes into a database. Right now the process is print information, hand jam into excel spreadsheet, print again, and hand jam into another excel spreadsheet on the other network. Reports are printed automatically once a day, but would like a simplified way of getting data from one network to the other without having to re-enter data several times. Current policies stipulate no USB drives connected to Control systems. Even if we could loosen that, personnel needed to transfer data is not available and going to each individual machine would take more time than current system.Now that background is laid, I have two 2911 ISR routers with EIGRP configured, each with a 4 port EHWIC card. The 3 L3 ports on the router are setup as follows: interface G0/1 to the internet, interface G0/2 to a wireless back haul, and interface G0/0 for IT network. I then have 3 VLANs setup on the EHWICs for our Admin network. We will move the IT network to a VLAN on the remaining EHWIC port and connect the two 2911's through the G0/0 interface. I am going to have one computer on my Administration network dedicated to receiving the information and have a program that will take that data and import it to a database. I need to allow only that computer to receive traffic from the Control network and I need no traffic to flow back into the Control network. In other words I will transmit data from the control network to the admin computer using one protocol (TFTP more than likely) and block any other traffic coming out of and going into the Control network.
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Jun 7, 2011
im attempting to setup a L2L VPN between an 1841 and an NSA 2400, via the SDM.The Tunnel comes up, and when I test connectivity it shows as being successful, but I do get an error stating:-
"A ping with data size of this VPN interface MTU size and 'Do not Fragment' bit set to the other end VPN device is failing. This may happen if there is a lesser MTU network which drops the 'Do not fragment' packets."
From my reading this shouldnt cause all traffic to drop though, right?
Currently I cannot ping or telnet to services from one end of the tunnel to the other. I was able to ping momentarily from the Sonicwall end at one point, but this disappeared shortly afterwards (without my changing anything regarding the config).
All of the ACLs created were populated through the SDM.
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Mar 27, 2011
I'm currently using ASA 5510 with software 8.4.1 and I have an issue with nat configuration. I used the following config line:nat (inside, dmz) source dynamic LAN Pat1 destination Server1 Server1
The traffic is not flowing and when I use Packet Tracer, packets are dropped at the NAT rule with the following error: Drop-reason: (acl-drop) Flow is denied by configured rule.The only ACE I have is permit ip any any.
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Jul 12, 2011
I have manually configured the Firewall ASA 5510 from existing PIX to match the configuration, however when I connect the firewall to the Network, no traffic is flowing in either direction. I have the Inside network on the 172.29.0.0 subnet and the outside network on 20.2.0.0 subnet. I am attaching the cofiguration file.
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Jun 13, 2013
i have a gateway router going to the internet....using public IP addresses on both interfaces. starting on Monday, traffic would suddenly stop flowing from the inside of the network going out, though i can still ping the outside interface , but when I log in to the router I am able to ping to the internet. so its like traffic is not passing from the outside int to the inside int. I have a 3900 router. other thing is, when i restart the router it will work for some time and then just stop again....
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Aug 20, 2012
I've got an ASA 5505 with the Security Plus license that I'm trying to configure.
So far I have setup NATing on two VLANs, one called 16jda (VLAN 16 - 10.16.2.0/24) and one called 16jdc (VLAN 11 - 10.105.11.0/24).
From each subnet I am able to connect to the internet, but I need these subnets to also be able to talk to each other.
I have each VLAN interface at security level 100 and enabled "same-security-traffic permit inter-interface", and I have setup static NAT mappings between the two subnets, but they still can't communicate.
When I try to ping there is no reply and the only log message is: 6 Aug 21 2012 09:00:54 302020 10.16.2.10 23336 10.105.11.6 0 Built inbound ICMP connection for faddr 10.16.2.10/23336 gaddr 10.105.11.6/0 laddr 10.105.11.6/0
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Oct 4, 2011
We have 3560 switch with following IOS. version 12.2(55)SE3 and image name is C3560-IPSERVICESK9-M. On one of the interface we need to know what are traffic is flowing.
Do we have "ip nbar or ip route-cache" support on this switch IOS? Is there any other way to find out which protocol traffic is flowing through that interface.
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Jun 3, 2013
I have two 1841's, setting up a Lab WAN in Packet Tracer. I have one of the 1841's run to a DSL modem, then out to the cloud and the same setup on the other end... from the cloud to the DSL modem and to the 1841 on that end... I have all green lights, so that tells me layer 2 is up, but I'm trying to figure out
what IP to assign the routers to test pinging and getting traffic flowing. but the DSL Modem's have the public IP's and dynamically assign an IP to the routers? I've also tried setting up a static IP on the routers fa0/0 interfaces and the pings fail.. Wondering what I am missing to get these two talking.
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Nov 2, 2011
I have a Cisco 2911 router with 4 T1 connections. Two are set as a multilink and the other two are for two other locations. The router will run fine, but after a month I cannot ping the gigabit ethernet 0/0 interface. I would have to manually reboot the router to get it to respond again. Before I noticed a lot of interface discards which would shutdown the 2911 and a manual reboot would be needed, but for this time it isn't the case. Where would I start with this the memory and cpu usage are fine.
Here is the config:
Current configuration : 2905 bytes
!
version 15.0
[Code].....
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Feb 19, 2013
I try to pass multicast traffic between two vrf on the same 3750 switch. I have IP services IOS and sdm template routing.
here is my config:
ip routing
!
ip vrf vpn2
rd 1:1
mdt default 232.1.1.1
route-target export 1:1
route-target import 1:1
[code]....
Now I'm stuck - I don't know what to do to pass multicast traffic. Do I have any chance to run this config on 3750 chassis?Perhaps "Configuring Multicast VPN Extranet Support" document will be useful, but it concerns Catalyst 6500? [URL]
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Mar 12, 2013
I start configuring Cisco 2821 router for multicast . First short description and attached sheme explanation. Let we say I have small network with 100 users. One router and Cisco switch 3560. Two VLAN’s, one for data another for multicast. Data from internet works fine but now I want to connect multicast servers (or source of more multicast streams) from another subnet. Router have three interfaces.I expect there should be no problems with multicast configuration, but unfortunately it is not like I expect. What I did ?
First step: enable multicast routing
Second step: on both interfaces (Fe 0/1 and Fe 0/2) - ip pim sparse-mode
Third step: configure switch that users are connected to access port in VLAN 222 (temporary to see if multicast work)
When I start VLC on computer nothing happend. If I try to connect computer on same subnet where is source of multicast streams it works fine.What I am doing wrong ? Is there anything about routing ? All subnets are directly connected. RP is not needed if I have one router or ?
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Mar 23, 2013
I need to enable multicast routing on 2960s but the command "ip multicast-routing" isn't available on my release (12.2.(55)).
From which release this command is available?
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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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Mar 8, 2013
I am configuring multicast in a environment where I have a 4506 at each site (4 total) and a 6506 as the core. Each 4506 is connected via layer 3 to the 6506. I have a mix of 3560s, 3548s, and 2960s connected to the 4506s and the 6506 via layer 2 trunk
I have multiple multicast sources and hosts communicating at a time (multiple cameras sending video / multiple computers receiving video). So this is not a scenario where there is 1 sender and many receivers. This would be many senders (~50) and some receivers (~10)
Sample Diagram:
->3560
|
6506 --> 4506 --> 3548
| |
| --> 2960
|
4506 --> 2960
|
-->3548
I configured ip multicast-routing on each of the 4506s and on the 6506. IGMP snooping is on by default on the 3560 and 2960 switches. CGMP is on by default on the 3548 switches.
I set up PIM sparse-dense mode and IGMP version 3 on each of the layer 3 interfaces for the 4506s and 6506 where they connect and on each VLAN that is sending or receiving multicast. Multicast is working throughout the network, however I am looking to verify the configuration as I scale this out to more clients on the network.
#1 - Is it correct to us sparse-dense mode in this configuration?
#2 - Do I need to configure a rendezvous points using AUTO-RP? (ip pim send-rp-announce INTERFACE scope TTL). Not sure here if I need to designate this and what to choose. Right now I do not have this and it is working, but documentation seems to infer that I need to designate this.
#3 - Is there any other configuration settings I should be considering? I hard to find real world configurations of multicast as examples or people that know multicast routing well.
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Apr 29, 2012
I would like test multicast routing with cisco1801.i create 2 Vlan. Vlan 200 (192.168.200.x) affect Fastethernet 1, Vlan 130 (192.168.130.x) Fastethernet 5.
Version IOS is : adipservice-k9 124-9.t1
ip multicast-routing
#int Vlan 130
ip address 192.168.130.254 255.255.255.0
Ip pim dense-mode
#int Vlan 200
Ip address 192.168.200.254 255.255.255.0
Ip pim dense-mode
I used VLC for my test.When i connect source (224.10.10.10) and recever ( Udp://@224.10.10.10:1234), that's ok!But, source is on the Vlan 200 and reicever on the Vlan 130, is not good!I test with "sparse-mode", i have same problem.
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Feb 21, 2013
I’ve been trying a few days now to implement multicast routing on my home network in order to make airplay work between subnets. Specifically between an iphone and a hifi separated by different vlans. Failed, as I have no experience in multicast routing. we have a clean configuration and simple network which consists of two SVIs
Vlan 10: 192.168.1.0 255.255.255.0
Vlan 20: 192.168.2.0 255.255.255.0
ios platform cisco 887
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Jan 17, 2012
while i am configuring a port on switch .The switch reloads.After reload the show version says,System returned to ROM by bus error at PC 0x458F6C, address 0x0,show version from the effected switch is,Cisco IOS Software, C3750E Software (C3750E-UNIVERSALK9-M), Version 12.2(58)SE2, RELEASE SOFTWARE (fc1).
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Nov 14, 2011
I faced multicast routing problem - There is no multicast UDP stream toward host, although all igmp Joins/Reports/Leaves from the host are correct.
This is Cisco 7609 ip m route debug showing the situation:
369144: Nov 15 15:03:07.370 MSK: IGMP(0): Received v2 Report on Vlan176 from 10.XXX.XX.184 for 239.XXX.XX.46
369145: Nov 15 15:03:07.370 MSK: IGMP(0): Received Group record for group 239.XXX.XX.46, mode 2 from 10.XXX.XX.184 for 0 sources
[code]....
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Feb 7, 2013
I have an 861 that we are using for a test network and need to add static igmp addresses for multicast. We are using the router as a router on a stick with subinterfaces on the WAN link. I've looked everywhere to see how to add the static igmp addresses.
interface FastEthernet4
no ip address
no ip route-cache cef
[Code]....
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Dec 10, 2012
I have a subnet with a GPS clock on it that connects into a Cisco 3750. The 3750 has another subnet hanging off of it that connects into a firewall then to a server. I need the server to get time from the GPS clock. Any way to pass the NTP through the 3750? The 3750 has the 3750-IPBase code running on it so the multicast support is limited. I am under regulatory restrictions that only allow traffic to flow from the higher security level (were the time server is) to lower security level (were the server is). This prevents me from having the server go to the clock for updates.
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