Cisco :: Multicast Dense Mode Pruning
Feb 24, 2013
I think I have a good handle on PIM dense mode, but some of the output.I think Im actually just overthinking this but I want to validate. When I look at the output of a 'show ip mroute' what does the bolded line. [code] From what I understand, packets that arrive at the RPF interface are flooded through all other interfaces. But what does it mean when it says 'Prune' in that bolded line? Does that mean that the router is sending a prune out of that interface?
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Jun 19, 2012
A multisite network is currently supporting muticast using PIM dense mode, which is enabled on router/switch LAN and WAN interfaces across all locations. I am about to introduce Nexus switches to the main LAN. How can I make dense and sparse mode coexist to ensure flow of muticast traffic between devices supporting and dense and sparse mode? Eventually, I want to transition to the sparse mode; however, it has to be done gradually, even within a single site. The leacy equipment includes Cat 3750 and 4500s.
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Oct 23, 2011
What is PIM? give me an example when I will use and not use the PIM command.
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Aug 30, 2012
We currently have ACE20's, which only support multicast in bridge mode.Was wondering if it's the same on ACE30's, or if Cisco finally implemented support for mcast in routed mode.
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Apr 25, 2012
i have an issue with a 2106 WLC. We have a 44xx series WLC and had an issue with Apple devices: they could not print from wireless. The workaround in the 44xx series WLC was that we have enabled Unicast in the Access Point Multicast mode (configued under Controller/General).
The issue now is that the 2106 wlc does not have unicast in AP multicast mode.
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Apr 16, 2013
I am using WLC 5508 version 7.0 facing issue while enabling global multicast mode .
client machine stops DNS resolution after some time once we enable global multicast mode on WLC .websites are opening with IPs but not with DNS names .
DNS resolution starts working immediately after disabling multicast mode on wlc .
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Jun 13, 2013
AP radio resets when the AP Multicast Mode IP is set 0.0.0.0 under the General Tab?
I rebuilt my lab controller and moved the management interface to a new subnet. Somehow, the AP Multicase Mode IP under the General Settings was removed. Afterwards, my AP's radios would reset every 2-3 minutes. After comparing my lab config to production, I noticed the IP was missing from that field. Setting the Multicast IP to 239.232.78.1 fixed the issue.
WLC 2504
AP 3502i
Code Version: 7.3.101.0
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Jan 23, 2013
I have one controller 2504 and some 1200 series access points.I am using 3 SSID .I want to use two ssid in HREAP mode but HREAP mode is not showinh in access point because multicast is enabled on AP mode. see the below picture
I have disabled the multicast globally from CLI. config network multicast global disabled
disabling the multicast so that i can set the access point in HREAP mode.
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Apr 9, 2012
I wanna implement the VTP pruning into my network, how can I calculate how much bandwidth I can save after its configuration? Is there a way to calculate this for a network with 30 switches? Does anybody have installed VTP pruning on your network at work?
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Jul 11, 2011
We have a pair of 6513s and upgraded the IOS version to 12.2(33)SXI4a. After the upgrade we noticed VTP Pruning was disabled: [code] Is there any effect to production we need to to consider when re-enabling? (In other words, do we need to wait until a maintenance window to enable?)Also, we are using VTP v2 (and v1...) on our VTP Client 3560 access switches.
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Apr 10, 2013
I recently installed (4) Cisco AP 1142 for a customer in a high rise commercial building - almost in like a downtown area where almost 30 other AP's are seen by my inSSIDer 3 software. I have the AP's running on channels 1,6 and 11. I have the 5ghz antennas enabled as well. I am getting occasional complaints from end users that they are losing complete connectivity. I will now need to pay some attention to the logs, etc.. Is there a Cisco Best Practices Guide for Deploying AP's in high dense environments like a High Rise? I recently installed (4) Cisco AP 1142 for a customer in a high rise commercial building - almost in like a downtown area where almost 30 other AP's are seen by my inSSIDer 3 software. I have the AP's running on channels 1,6 and 11. I have the 5ghz antennas enabled as well. I am getting occasional complaints from end users that they are losing complete connectivity. I will now need to pay some attention to the logs, etc.. but my question is this.Is there a Cisco Best Practices Guide for Deploying AP's in high dense environments like a High Rise?
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Dec 18, 2011
does the SG300 switches can be used with Microsoft NLB in Multicast mode?I know on traditional Catalyst switches you can statically "map" IP's to mac's and then to multiple ports but this doesn't seem to work correctly on the SG switches - it gives an error about the mac not being not Unicast?
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Apr 18, 2012
Why do we need MP-BGP (and not BGP) to exchange multicast prefixes between multicast domains?
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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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Sep 16, 2012
I got an ASA 5510 system currently in single context mode, with CSC SSM installed. Single ISP uplink to internet, no VPN. And now customer would like add another ISP uplink, without invest another box for HA.What come across my mind is make the current box into multi context. There's some area i need to concern and also need yours perspective on it.
Question 1: For making the firewall into multi context, am i need to do it from scratch, issue mode multiple command. Then rebuilt the current production config into one of the context, then another context meant for the new IPS uplink, and one admin context?
Question 2: For CSC -SSM licensing requirement, model ASA 5510 with security plus license is able to support 2 context. So if i split my firewall like what i mention in question, what exactly number of context do i own (admin, context A, context B)?
Question 3: For CSC-SSM module in multi context mode, so the management port of CSC SSM must attach at admin context?
Question 4: After configured all the policy and traffic to scan, how exactly i should do in order apply this policy to the interface? Should i only enable at admin context, then firewall service-policy rules, and apply it global, OR should i also do the same action on context A and Context B?
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Mar 4, 2012
We have recently converted 1 Cisco Lightweight AP 1041 to Autonomous mode for site-survey purposes. We now want to convert it back to lightweight mode.
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Mar 12, 2013
I received the following info from Cisco's TAC and wanted to inquire further before I start reconfiguring the switch:
In a redundant Sup-6E setup, the following configuration is supported :
- 1 TenGig uplink on Active Sup and 1 TenGig uplink on Standby Sup
- 1 TenGig uplink on Active Sup and 2 Gig uplinks on Standby Sup
- 2 Gig uplinks on Active Sup and 1 TenGig uplink on Standby Sup
- 2 Gig uplink on Active Sup and 2 Gig uplinks on Standby Sup
If you invoke shared backplane mode, the following configuration can also be supported:
- 2 TenGig uplinks(blocking) on Active Sup and 2 TenGig uplinks on Standby Sup
- 2 TenGig uplink(blocking) on Active Sup and 4 Gig uplinks on Standby Sup
- 4 Gig uplinks on Active Sup and 2 TenGig uplinks(blocking) on Standby Sup
- 4 Gig uplink on Active Sup and 4 Gig uplinks on Standby Sup
Here's the command and information about the "shared-backplane" mode :- [URL]
Currently, we have 2 SUP 6-Es(Module 5 - Active and Module 6 - Stand-by) setup in a redundent mode. I am planning on changing the redundent mode to the shared backplane mode so I can use 2 TenGig converters to uplink 2 access-switches. We purchased 2 TenGig converters and here is how I am planning on using them:
1- One will be used to uplink to two 3750 switches(stacked)
2- One will be used to uplink to a 2960 using a Gig SFP
My questions are:
1- Do I have to install the 2 TenGig converters(4-Gig Uplinks) in the same Module? Or can I use one one in module 5 and the second one in module 6?
2- Will changing the redundant mode to the shared backplane mode require rebooting the switch or disrupt the funtionality of the other linecards?
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Feb 26, 2013
How can we know that 6500 and 7600 series switch and router are running in native mode or in hybrid mode.
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Feb 19, 2013
I am not able to connect to any webpages in normal mode, even after restarting i still have the same problem [However it works in safe mode with networking]. The network connections show that it is connected and the signal strength is excellent. I then have to keep restarting the laptop like 3 to 4 times and it works. Its kind of frustrating to keep doing this all the time and besides i am scared by restarting the laptop so many time can harm it.
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Feb 28, 2012
i got a Dir-655 router and Dell 1501 wireless -N mini PCI card (802.11 bgn compliant). Router was set to mix mode but my desktop Dell XP8300 can connect only till G mode.
1) I search on web and some said that i need to set my router to N mode only for my desktop to connect to N mode. IS THIS SOLUTION CORRECT??
2) Another issue was my sis got other old brand latop which can only connect to B mode, if i set to N mode only, she won't be able to connect it right?
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Dec 17, 2010
I am implementing mGRE with DMVPN so multicast traffic can be delivered to employee homes over Internet, everything worked fine except that I can not configure PIM or ICMP static groups on C881W's mGRE tunnel interface or BVI interface(RIPv2 works on mGRE interface however), configuring "ip multicast-routing" did not give me any errors, do I need license to be about to configure PIM/IGMP? I am running C880data-universalk9.mz.124-20.T5.bin" with license level advsecurity.
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Jun 5, 2012
The desktop team has asked me to set up multicast in our network with building PC's as they will be deploying a few hundred of them starting in two weeks. We currently do not have multicast set up, and the only experience I have with it was during my certification studies, so I have a lot to catch up on quick. They will be sending the build traffic from a single server. The network environment is simple: a 3750 stack as the router/distribution layer and mainly 3550's as access. The PC's that they will be imaging will be on one VLAN that is already designated for PXE builds. This VLAN is across multiple switches. Is it possible to just enable the multicast features on a single VLAN? I have been reading around but not finding much other that very in-depth Cisco papers.
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Feb 20, 2013
I am trying to do a Multicast lab in gns3 with a tap interface in os x and a linux vm in virtualbox. The os x box is broadcasting to 224.1.1.1. I have verified IP connectivity. I am using PIM dense mode. When I perform a packet capture on the tap interface I see no traffic to 224.1.1.1. However when I ping 224.1.1.1 from os x I see the traffic. Attached is my topology
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Mar 6, 2012
The topics I'm looking to learn about: VRF,Multicast different VPN types mpls...ect. GRE TunnelsIPS/IDS configuration. I know about the Routing TCP/IP, Volume 1 and Volume 2 by Jeff Doyle.I don't have them, but I'm interested.
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Feb 8, 2013
I am planning to get the unicast streams from different 2-3 sources over internet, and I am doing NAT for port-forwarding all those unicast streams to a one private IP. Attached is the setup for your understanding.Setup: - Both unicast streams will be hitting to One Public IP (3.3.3.2) on UDP/TCP Port 1234, 1236 & 1238 only & the same ports need to be forwarded to natted One Private IP (10.10.10.4)
1)NATTING these 2 unicast streams into one private IP(10.10.10.4) by checking Source & Destination based IPs and ports, but in below configuration I cannot achieve on checking Source & Destination based IPs and ports
Router configuration:-
interface GigabitEthernet0/0
description ***Connected to Internet ***
ip address 3.3.3.2 255.255.255.252
no ip redirects
no ip unreachables
[code]...
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Dec 9, 2012
I have multicast routing setup between two Nexus 7K's.These Nexus 7K's act as the distribution layer and they connect to 48 different 4507 access layer switches (VPC) and 3 6509 core layer switches.The 4507 swiches have two supervisor modules. One acting as active and the other as hot standby. Let's assume that multicast is working on the active module. If I pull out the active module the hot standby takes it's place. This is where multicast stops working on the switch.How can I get both Nexus 7K's to work with multicast at the same time. Here is an example of show ip mroute from both Nexus 7K's:note that DR02 has a lot more entries in the routing table. Is this working as designed?
DR01-C7018# sh ip mroute
IP Multicast Routing Table for VRF "default"
(*, 224.0.0.0/4), bidir, uptime: 1y11w, pim ip
Incoming interface: Ethernet3/1, RPF nbr: 172.18.254.109
Outgoing interface list: (count: 1)
Ethernet3/1, uptime: 29w3d, pim, (RPF)
[code].....
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Oct 18, 2012
Does L2TPV3 will support multicast?
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May 18, 2012
i have a couple of nexus 7010 (5(2)3a) connected to a checkpoint in HA(active/active)I have now to configure multicast mac..i found this commmand: [code]
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Apr 2, 2011
I have a application whose components are talking to each other via one multicast address 235.19.4.10.
This application is running on two different IP Subnets 192.168.121.0/24 and 192.168.99.0/24. It must be required that these two IP Subnets must not see each other thus they are configured on two different VLANs. Now we have a requirement where this application need to be installed on Remote Sites where Routers will be used to provide the connectivity.
The problem I am facing is that if I will configure the Remote Sites with some other IP Subnets e.g. 192.168.1.0/24 than Networks are unable to talk to each other even Multicast Routing is configured on Routers. Now at least as per my requirement, I need two separate subnets need to be configured on remote sites where one subnet will communicate with Subnet 192.168.121.0/24 and other subnet will communicate with 192.168.99.0/24.
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Feb 10, 2012
i already created a vpn server on my 878 router.. so that i can connect with ip-sec (cisco vpn client) to this router and network..
all working great... however... when i also want to allow multicast traffic over my vpn connection. do i then need a GRE vpn? or what?or is this only needed when you use a site to site vpn..?And how can i enable this?
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Jan 18, 2012
i want to enable net flow for multicast on my 6509-E with IOS s72033-advipservicesk9_wan-mz.122-33.SXI2a. I've checked the ios via software adviser to be sure that this feature is supported: Minimum Compatible Release 5 Additional Software
12.2SXJ Early Deployment View View View 512 512 N/A 12.2(33)SXJ s72033-advipservicesk9-mz.12.2-33.SXJ 12.2(33)SXJ N/A
12.2SXI Early Deployment View View View 512 512 N/A 12.2(33)SXI1s72033-advipservicesk9-mz.12.2-33.SXI1 12.2(33)SXI
I've used the command "ip multicast net flow output-counters", but that is not enough, i guess. It is required to use further interface commands like "ip multicast netflow....", isn't it? But this commands are not available:
Cisco6509(config-if)#ip multicast ?
boundary Boundary for administratively scoped multicast addresses
helper-map Broadcast to Multicast map OR Multicast to ip-address map
limit Limit multicast mroute state
[code]....
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Jun 23, 2011
Facing a problem of double multicast on one of our cisco 3750 switch. On checking with sniffer it was found that out of double packet’s one packet is having source mac-address of vlan and another packet is having a source mac-address of switch base mac-address.
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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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