Cisco :: Implementing The Multicast In The Network
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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Oct 2, 2011
I have a major problem regarding implementing IP Multicast in an ADSL network. The diagram of our network is attached. In every Access Network , there is only IP DSLAMs which are connected via Metro ethernet links ( L2 links) to the main site. So there is no Router or Layer 3 Link to the main site. In the main site there is an Aggregator router which is an PPPOE server which terminates subscriber's PPPOE sessions. All the Access networks and subscribers are just connected to one Aggregator and they use that one as PPPOE server. It is an Cisco 3845 Router. Then the Aggregator is connected to Core network and behind the Core network is an Streaming server which streams in Multicast. IP Multicast Routing is configured in Spars-Dense mode in all routers in Core network and also the Aggregator and it is working properly. So the sucscribers are able to join the multicast stream and the very last router in the path toward the subscribers( which is the Aggregator) does the Multicast replications.
There are two problems we faced:
1- Since all the subscribers from different Access Network use the same Aggregator in the central site as PPPOE Server, all the connection are terminated on that router. The goal is to use the uplink bandwidth of the Access networks to the central site more efficiently and if e.g 20 subscribers watches the same channel, it just consumes as the amount of one channel due to doing IP Multicast.Now the problem is that when for example 2 subscribers of the same Access Network (in the same POP site) connect to the same stream, the amount of bandwidth used between the central site and the Access network is double. It happens because the aggregator activates IGMP on every virtual-access lines for every PPPOE subscribers who wants to joint the stream. So it can not recognized these two subscribers are from the same Access network. Therefore, the result is that although it is doing Multicast, it does not save the bandwidth because it activates IGMP group on every subscriber's virtual access line for his PPPOE connection. So is there any solution to this problem? Something came to my mind that we need to implement a separate aggregator for every Access network which means that we have to place a router for every access site and it will be expensive for us. But I think in that case every local aggregator can do IP Multicat routing and it saves the bandwidth definitely. Any better solution that may solve our problem using the same topology?
2- Another problem is that when the subscriber's CPE are configured in bridge mode and subscribers set-up a PPPOE connection on their PCs, they are able to join the multicast stream properly. But when they put their CPE in router mode and have their ADSL modems as PPPOE client, they are not able to join the Multicast stream. i.e the ADSL modem is doing NAT and routing and it connects to PPPOE server using username/password credentials. I also tried a feature in ADSL modems called "IGMP support" when I wanted to create the WAN settings. But it did not work. I am not sure but I think that we need "IGMP Proxy" feature on subscriber's CPE.
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Aug 12, 2012
Existing nework New Network
I have attached some diagram here, 2911 Router configured as a zone based firewall and it works fine. I need to put ASA 5510 as an internal Firewall in to the existing network. So I need to hand-over the NATing configuration from IOS FW to ASA 5510 , are there any special configs here? I have done this but it's not working, If i bypass IOS ZB FW and ASA directly connect to internet Its works fine, If NAT configurations keep in IOS ZB FW then it works fine.
I have attached IOS ZB FW current config file below.
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Dec 9, 2012
I have a task to compare different approaches to implement InterVLAN routing in campus network. Google suggests only Cisco technologies for such query. But what I need is also other companies solutions (like Dell, HP etc), cost of the implementations, pros and cons.
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Oct 13, 2011
We have customer with implementation ACS5.2 in Windows environment. Now they want to implement IP phones in the network.
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Jan 16, 2013
I am implementing QoS on our MPLS network. Our environment exists of a mix of Cisco 2960 and 3560 switches. The IPT system is Avaya CM with Avaya phones.The WAN network is a MPLS network.Ports are configured for access and voice vlan (no trunking), one vlan for voice, one for data (vlan 1 is disabled).I dont have Qos coonfigured on LAN just wanted to configure on WAN Router where my Mpls link is connected.I have 45 Mb Mpls links on all sites connected to each other.
I have multiple sites connected via MPLS and i have control at both sides.Current config is mentioned below in which DSCP marking is not done for signaling. What is the best config with example.Current Config on all Cisco Router where MPLS link is terminated at all sites. [code]
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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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Aug 4, 2011
We want to implement multicast on our network. We are going to use for online teaching purpose. I am very new at Multicast and not have much idea about it. We are not running any routing protocol in our network, only static route. The multicast server is located at One of our office and it is connected with L2 (Cisco 2960) switch, L2 switch is connected to L3 switch(Cisco 4948). L3(Cisco 4948) and Core Switch(Cisco 6509) with FWSM are connected with E-3 link with tunnel. Router 1 and Router 2 are connected with P2P ILL links which are terminated at serial interface. The Multicast Server IP is 192.168.2.131/25. The scenario of our network are mentioned below:
Multicast Server--->(L2 Switch)--->(L3 Switch)--->(Core Switch)--->(FWSM)--->(Router 1)---->(Router 2)--->(L2 Switch)--->(Multicast Client)
We have created a seprate vlan (i.e. vlan 102, interface IP is 192.168.2.129/25) for multicast at L3 switch, enable multicast routing, defined rp-address(i.e. 192.168.2.129/25), enable sparse-dense mode at multicast vlan as well as at some other vlan also for testing purpose and joined multicast group (i.e. Multicast IP is 224.3.3.5). At core switch we have also enabled multicast routing, defined rp-address (i.e. 19.268.2.129/25), enable sparse-dense mode at user vlan and inside vlan of FWSM and joined multicast group at user vlan and inside vlan. At FWSM we have enabled multicast routing, defined rp-address(192.168.2.129), doesn’t find any option to enable sparse-dense mode and joined Multicast group at inside vlan and router 1 vlan. At Router 1, we have configured the same thing. We have configured mroute at all the devices. We are able to ping from end to end. We are testing multicast by Multicast IP checker tool (provided by vendor). Multicast is working fine at L2 switch, L3 switch and Core Switch, but not from Router 1. Ping is reachable from Router 1. After doing mtrace at Router 1, the following output has come:
Router 1 (Mtrace with destination address 192.168.2.131)
mtrace 172.21.15.2 192.168.2.131 224.3.3.5
Type escape sequence to abort.
Mtrace from 172.21.254.50 to 192.168.2.131 via group 224.3.3.5
From source (?) to destination (?)
[Code] .....
If , we do mtrace from gateway IP address(i.e. 192.168.2.129) as destination address then mtrace is getting completed, but if mtrace is done from Mutlicast server IP address(192.168.2.131) as destination address, then mtrace is not getting completed.
We have connected one laptop at Router 1 vlan to test Multicast. The host, which is connected to Router 1 vlan is able to send multicast packet to other host and other host at different vlan are receiving it , but it’s unable to receive multicast packet send by other host of different vlan.
Do I need to enable igmp snooping at L2 switch, L3 switch and Core Switch ? I am not able to understand or can't figure out where i have configured wrong.
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Apr 12, 2011
My IPTV connection works fine so far but as soon as I start watching TV I can't use my WiFi connection anymore. My router is an "Alice Modem 1121" (SIEMENS S1621-Z220-A) with 4 LAN ports and a WiFi interface (4th LAN port provides the IPTV). It is directly connected by wire to my PC's ethernet card for the IPTV and the internet is provided via the WiFi. When I activate the LAN connection the WiFi and internet connction stays up and requests can be sent but nothing returns anymore. Another device (iPod) has no problems with accessing the internet while IPTV is in use. I also have a Netgear WNR1000v3 router which I tried to use as AP instead but it's exactly the same problem. Unlucky the Netgear router is not supported to use dd-wrt firmware yet (I've found a step by step guide to prevent multicast floods with dd-wrt/ebtables). But maybe the Alice Modem can handle this problem on its own. I read some stuff about VLANs and splitting them but I have no clue how that would look like.
The "nas_0_1_34" is for the IPTV.
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Jan 30, 2013
i have a campus network with 2 core Cat6500 and multiple 4500 series distribution switches plus 2960 series access switches,we have deployed IPTV system in the network but currently 50 TVs are working through sattelite stream from streaming server Cisco's DCM 9900.we are planning to add more 300 TVs in the network and i am wondering that when all of them will be deployed then what will happen for switches cpu utilizations when all the Tvs will be running on the same time with different different channels.
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Mar 15, 2012
We have backup and other traffic over our vpn which is affecting our ip phone service between two sites. Our consultant suggested implementing QOS over the VPN to give the phone traffic priority. Is this possible with the rvs4000. Is there any good source saying how to do it. Is the setup of the QOS on this router similar to another router where this has been discussed.
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May 22, 2012
I have a problem implementing a NAR for a specific device group. I am running Cisco ACS 4.2 and it works fine for all the other stuff I do but this issue is perplexing me a bit.
I have a device group with Juniper devices in it and I authenticate using RADIUS (Juniper) as the radius setting. I have a Administration user group set up.
I placed a NAR into the group "Per Group Defined Network Access Restrictions" specific to the device group with * for port and address
I placed this group into both the Define IP-Based as well as the Define CLI/DNIS-based section.
No matter what I do I keep getting authenticated.
When I go to the passed authentications page I see my login and the group-name is identified correctly and the network device group is identified correctly too. The filter says "no filters activated". So how can I get this NAR to kick in? I would like to restrict one device group from a ACS user group.
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Jul 24, 2011
I was able to successfully implement MS-PEAP authentication with 5508 WLAN controllers and Cisco ACS v4.2. However, when I integrated 4402 WLC with version code 7.0.116, it did not pass across any authentication requests. Did a debug aaa events enable and there was no output. Configured another SSSID with PSK to test that my controller was OK and aaa debug was working, and there were CLI messages when I associated an AP.
why the 4402 is not working as I have compared configs with the 5508 and there is no difference. The shared secret is configured on both ACS and Controller and CA is downloaded on the ACS.
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Mar 25, 2012
I have to propose/design a network system. It has 350 computer terminals/workstations out of which 300 of them are divided into two separate networks while the other 50 are to be on another network. So I assume I'd need 3 networks (or LANs) I guess (all connected ofcourse)So far I've inferred it needs a mail server, a file server, a print server, a DHCP server to assign IP addresses (C class and private ones ofcourse) and a web proxy server. Also I thought a fast Ethernet LAN network might be ideal here but I'm not quite sure on that (nor have I ascertained what sort of topology or hardware to use).
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Feb 15, 2012
I'm attempting to configure Classification and Marking on our access switches using the MQC model. The Switches are 3750's running IPBase Version 12.2(35)SE. For some reason when I activate the policy-map on an interface, no traffic is being tagged, i've used the 3750 QoS configuration examples (url) for reference.
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Oct 12, 2012
I want to implement VoIP on my client network, currently the data network is using SG300-28P small business switches for user access. According to my design the IP Phones (Cisco 9971 and 7942G IP Phones) are to connect to the small business access switches while the user PCs connects to the IP Phones.
My concern is I really don't understand how the small busness switches will advertise the voice VLAN to the IP Phones. I understand that the switches are suppouse to use LLDP/CDP for this but it seems the model I have can only do LLDP. The IP Phones and the PCs connected to them will be recieving IP addresses from an uplink L3 managed switch.
how LLDP works (particularly regarding this scenario)? Does it matter if the small business switch is in L2 or L3 mode for the VoIP implementation?
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Apr 30, 2013
Need to configure Cisco 1142 N access Point togetherwith the Cisco Switch . I have a POE Switch 4510 and Cisco 1142 N Cisco AP . I have one management vlan 5 & User VLAN for WIFI VLAN 10 . The problem is when i make the POE port which is connected to the AP as trunk port means : [code]I am not able to ping the management IP allotted from VLAN 5 . However when i make it as access i am able to ping the managament IP . But for both the VLANs to work it should be in trunk mode & in cisco i can either assign the port as access or trunk .Post this i would configure the 1142 N with Cisco SG300-10P POE Switch . I guess if issue with my 4510 gets resolved the same way i can configure SG300-10P as well .
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Jan 3, 2013
We have two 2100 WLC's that support 12 access points. One has been sitting in a box for some time, but we're at the point where we need to add additional access points that will put us in excess of the 12 limitation. What is the best way to go for installing the second WLC?
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Apr 25, 2012
I have roughly 50 users that are remote, and use VPN to access the resources in my network such as file servers, application servers etc. We currently use Microsoft VPN to authenticate those users. It works, but I am not a fan on Microsoft VPN.
I have purchased an ASA5520 to replace my crappy layer 3 HP core backbone switch, and plan on replacing my Microsoft VPN with Cisco VPN. I want to configure my ASA so my remote users can continue to VPN into my network securely?Is this possible?
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Apr 14, 2013
I am facing problem in implementing NAT on Cisco 8.4 . the scenario is
Inside interface network 10.10.10.0/24 and 10.118.0.0/16 is also routed towards inside network
Other network 192.168.10.0/24 is routed via outside interface.
My requirement is to NAT the 192.168.10.2(real IP) to 10.10.10.2(mapped ip) so that when users from inside network (10.118.0.0/16) will come they will access the 10.10.10.2 instead of the real Ip(192.168.10.2)
So I used nat (inside,Extra net) source static obj-10.118.0.0 obj-10.118.0.0 destination static obj-10.10.10.2 obj-192.168.10.2 but the connection is not working but with show nat I am getting hits on the NAT statement.
cap test Ethernet-type arp interface inside real-time
1: 23:29:05.684199 arp who-has 10.10.10.2 tell 10.10.10.1
2: 23:29:09.687998 arp who-has 10.10.10.2 tell 10.10.10.1
I have also enabled the proxy arp on the inside interface but still the connection was not working.
Packet tracer output
[Code] .........
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Feb 28, 2013
I have a 5520 acting as a VPN server... and 5505's acting as clients.The 5505's connect fine when using "client mode" but things go sideways when I try and use NEM.Namely, they never complete a connection.
debug vpnclient shows this repeating rather fast (this device is connected a Fios connection behind a gateway/router (it's my test environment and it does work when I have the device setup in "vpnclient mode client-mode".
Some of my remote sites are configured directly with a public IP (issued via DHCP) others are behind a 3rd party firewall/device that I have no control over... but again, these sites currently work as "vpnclient mode client-mode". [code]
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May 15, 2011
With IPv6 Coming i've been tasked with implementing M-BGP on our 7200VXR running 12.4.
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Sep 30, 2012
After implementing TACACS, one of our routers takes about 8 seconds to response to any CLI command. We have no problems with other devices in the same location with the same AAA configuration. The router is talking to the ACS server (ACS 5.3) and the logs on the ACS server look normal for the router as well.
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Dec 16, 2012
implement VOIP on my router 3825 I have Ip phone 7905G and 7960.
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Oct 29, 2012
I have a ASA 5510 and planning to implement multiple context in a 2 tier security level and vrf-lite. meaning I have 2xASA facing the internet and below that a 2x3560 switch for our extranet and below that is another 2xASA for intranet. See diagram below. In this kind of network I want to know how it would impact the total throughput and resources of the ASA using multiple context?
INTERNET
| |
| |
2811A 2811B
| |
| | (OUTSIDE)
ASA_A-------ASA_B
| | (INSIDE)
| |
3560A---------3560B
| |
| | (INSIDE)
ASA_C--------ASA_D
| |
| | (OUTSIDE)
3560C----------3560B
| |
INTERNAL NETWORK
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May 2, 2011
i have the following scenario that i'm requesting you guys verify if it will work.I have a 3550 catalyst switch running EMI and an auotomous 1131AG aironet ap, i have two dhcp pools already setup on the switch one for the LAN and the other for the wireless clients.There are two vlans on both the switch and ap for LAN and wireless clients.I have already setup multiple SSID's to be broadcasted from the AP, is there a way i can bind one SSID to the lan dhcp pool and the other to the wireless clients dhcp pool?
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Mar 21, 2013
We currently have 3* offices located in London, Reading and Oxford which have a (ISP) VPLS service to interconnect all sites.I am using RIPv2 for intersite routing between all offices. We plan on implementing a backup circuit at the Oxford office for resiliency.There are 2* Core 4500 Switches, Core 1 is uplinked to the Primary circuit and Core 2 will be uplinked to the Backup circuit.At the moment Core 2 learns all of its routes from Core 1.My question is, if the Primary circuit goes down, how do we get the Routing on the Core Switches to than point out of the backup circuit?
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Aug 19, 2012
Can I implement MACsec betwen two Cisoc 3750X using the C3KX-NM-1G? 3750x (C3KX-NM-1G) -------------------MMF------------------(C3KX-NM-1G) 3750x.
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Apr 15, 2012
I am having difficulties implementing Mac-auth on selected ports between an HP ProCurve 2510 and Cisco ACS 5.3.The 802.1x works just fine, but for selected ports I need to implement port-access with MAC-based authentication instead of regular 802.1X (yeah, I know, but this line of ProCurve switches only support one auth-mechanism per port!).The switch successfully forwards interesting MAC-auth requests for authentication to the ACS with CHAP/MD5, but the ACS reports this:
Logged At:
April 16,2012 1:20:48.080 PM
RADIUS Status:
Authentication failed : 22056 Subject not found in the applicable identity store(s). NAS Failure:
Username:
002655886b3d MAC/IP Address:
00-26-55-88-6b-3d Network Device:
[code].....
The ACS is configured to use the Internal Hosts database, where the client computer is configured like this;MAC-address: 00-26-55-88-6B-3D
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Apr 16, 2013
The server team has asked me to implement jumbo frames on a single VLAN, the one they use for v motion. We have two pairs of 5548s, each pair running VPC for most connections. I am aware of many postings that describe how to enable jumbo frames globally, like this:
policy-map type network-qos jumbo
class type network-qos class-default
[code].....
I am not clear how I can extend this principle to one VLAN only.
Also, I am aware of a posting [URL], that shows some pitfalls of implementing jumbo frames in a VPC configuration. Pretty well all my connections are VPC, including all the FEXes, which are all dual-homed. In many cases, the VPC extends through to the servers so that the servers run port.channels across two FEXes. I am unclear whether the pitfalls are still valid, or whether I have to wait until my next maintenance slot (6 months away) to implement jumbo frames. Can jumbo frames be implement safely on the fly? How does enabling jumbo frames fit in with "conf sync" mode?
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Jul 17, 2012
I was looking for configuring QOS for two VLANS i have created. these will be for voice traffic vlan 22 and video traffic vlan23. i also have three other vlans for pc's, wireless devices and our cnc machines. we have 5 switches that are all SG30028P's with a single switch doing the intervlan routing (operating at layer 3). all of the switches are trunked back to the main switch and ive been through the guide written on how to do this on a single switch which i dont think is layer 3.
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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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