Cisco WAN :: Multicast To Unicast Through 2921 Router
Apr 15, 2013
We recently acquire a cisco 2921/K9 router to interface 2 networks
Network 1 : 169.254.XXX.XXX/16 on GigabitEthernet0/0 interface
Network 2 : 192.168.1.XXX/24 on GigabitEthernet0/1 interface
On the network 1 side there is a multicast source (169.254.200.200 destination : 225.0.0.1) on the network 2 side there is 1 receiver which is not multicast capable(old) but i want it to receive the multicast stream for the moment we configure the ip multicast-routing and each interface each interface with ip pim sparse-dense-mode then configure the GigabitEthernet0/1 in order to join the multicast group (using ip igmp static-group 225.0.0.1) and wireshark confirm that the multicast stream on the network 2 side from 169.254.200.200 -> 225.0.0.1 of course the receiver don't the stream, but if i force a "multicast to unicast" process inside the router it shall be ok.. after many hour of internet browsing i found 2 solution :
- NAT, [URL]
- multicast service reflection (Cisco documentation)
The NAT example don't work ,what is the best way to do this task.
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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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May 26, 2013
Is it possible to convert multicast streams (224.0.0.1:1234) to unicast (Receiver 10.0.0.1:1234) at the router level.
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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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Apr 17, 2012
I've been looking for a way to detect the level of traffic caused by unknown unicast traffic on a Catalyst 6509.I have found mechanisms to mitigate it but nothing to actually detect/measure what the levels might be.
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Apr 8, 2013
We have a problem with NLB on a SG500-28P which is a major issue for us.
I am investigating a problem together with Microsoft Support about a download/upload performance issue with a Microsoft Forefront TMG array which is connected to a single SG300-28P. Àpparently this issue exist on every NLB array we implement. I am now at the point we asume the SG500-28P does not handle NLB in unicast mode very well.
We have a network topology as shown below:Please note the actual public IP Addresses are hidden and the internal IP Addresses are diffrent, for security reasons.
Our SG500-28P is configure in L3 mode. It hosts three subnets you see above. The two TMG servers are configured with NLB (in unicast mode) on the Internal Network and External Network interface. It is connected to the internet and our internal network. These TMG Servers are in fact Edge Servers. Our other servers and client are in a different VLAN. The default gateway flows through this NLB Cluster [10.250.0.254].
Problem: When a client uses its default to connect to the internet the performance is very and very slow. With an internet connection of 10/10 we get 10/2. With an internet connection 100/100 we only get 7/1!.
Now we have tried everyting we can imagine. I can't write down all, because that would be a lot. One thing is worth notice; When we move the client to the same VLAN as the NLB Cluster and the client uses 10.250.0.1 as its default gateway, the problem still exists. But... when the client uses 10.250.0.254 as its default gateway the performance is outstanding 95/95! Apparently if traffic for the NLB Cluster is routed through the SG300-28P the performance drops like a rock.
I have never seen this before with SG300 series switches, although this environment is different. Normally I would configure NLB in multicast mode. But the switch does not allow to add static ARP entries for multicast MAC Addresses.I know NLB in unicast mode introduces switch flooding and such. But why does the SG500 not handle this right? Is there anything I can do about it?
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Feb 3, 2011
I was wondering if the following scenario would work:
2 Microsoft TMG servers (could be any W2K8 R2 based server, e.g. UAG, Exchange etc.) configured for Unicast NLB. The servers are connected to separate L2 switches which are connected to a highly available central L3 switch (see attached drawing).
Unicast NLB works in such a way that it uses a shared virtual IP and a virtual MAC addres which is not used as Source MAC address when the TMG servers are respondign to requests.Basically it relies onto the fact that the switch does not learn the virtual MAC address and floods all packets destined to the virtual MAC on all ports. The L3 switch would learn the MAC through ARP. The question now is, what the L3 switch would do, if it receives a packet destined for the NLB VIP. It should do an ARP request in order to receive the virtual MAC. How would he decide on which port(s) to forward the packet as he does not know on which port the MAC is found. Can he make a decision based on Layer 3 (IP/VLAN based) therefore he knows that the VLAN for the TMGs is connected on those two uplink ports?
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Feb 6, 2013
We have problems with 3 switches in our network.
Users continues receive adresse via DHCP, but no traffic was forwarded. After reboot switch works fine about one week and problem arrives.
I telnet to one problem switch and try to found reason by reaply acl and source guard and saw some strange message:
nov-20(config)#int r gi1-48
nov-20(config-if-range)#no service-acl input
nov-20(config-if-range)#service-acl input 2
Exceeded the maximum ACE allowed in the system. -repeated 48 times
Configuration and log int attachment (show tech-support)
port 52 - uplink, 1-47 - users, 49-51 - downlink switches (SPS224g4) with aprox 200 pc connected. 48-ups
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Apr 27, 2013
i recently identified all switch ports in my network on 6509 core were Transmitting Mail server Exchange traffic that was destined for Unicast NLB cluster. and it was impacting various HOST machines NIC cards/performance.After reading this article, i moved NLB CAS servers behind a dedicated cisco Switch.
[URL]
Now My core switch can learn mac address across its trunk port where CAS servers are connected on dedicated switch. but still i can see traffic Transmitting out to my all switch ports of same VLAN ( same as NLB VLAN).
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Nov 28, 2011
I have a serious problem with nexus 7018, there're unicast flooding on one n7k, named n7k-1, which is the member of vPC domain combined with 2 N7Ks. [code]I had clean the mac-address-table, and all mac-address-tables had been synced fine, and the unicast flooding went away.
How could I fix the mac-address sync function between the modules ?
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Jan 9, 2011
I'm having an issue with my network, where we're are experiencing random and brief network outages. They happen a couple times a day and last 5-10 seconds. when I check my two backbone switches (4506 : Supervisor: WS-X4516-10GE ,IOS : cat4500-ipbase-mz.122-31.SGA8.bin), STP remains normal and no topology change occurs.
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Feb 27, 2013
There is a unicast flood on 3750 killing slow modem links. How to determine source MAC address of flooder? Is there a rate limit feature for it?
I know how to block it completely on port-level, but it breaks normal network operation. (when port goes down for some reason, it's learned MACs got flushed and since other hosts know MACs, they keep flooding untill their arp caches expire).
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Oct 13, 2011
I need a router to connect to our ISP by BGP and in a future to a second ISP. Our ISP is going to provide us about 300.000 route entries by BGP. So router 2921 would be enough??? or should i go to a higher model?We are going to have 100Mbps with this ISP and probably in 3 months we'll have to double it. Also we'll need IPv6 support.I saw router performance [URL]f and it's has 480.000 PPS and 245 Mbps but for 64 bytes lenght packages. If the packets are bigger the throughput should be best I suppose... 1500 bytes about 5,5 Gbps. In the case you consider the model is sufficient, the flash or RAM should be increased?
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Feb 20, 2013
Is there a recommended number of GRE tunnels that Cisco 2921 ISR router with default configuration (512MB DDR2 ECC DRAM) can support?
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Jul 11, 2012
I am installing a security license on Cisco 2911 Router for the first time. It already has a temporary license installed on it which is expiring soon. Cisco has already mailed me the procedure for installation. I want to know if i need to uninstall the previous license before installing the new one.
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May 19, 2013
I need to configure cisco router 2921 for snmp v3,
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Jun 27, 2011
I just purchased thie Cisco 2921 router and have all the configuration completed except the Firewall and NAT. We have 4 supnets at our location on the router each with a DHCP handed from the router to our network. Any examples for the Firewall and Nat configurations?
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Oct 2, 2012
We have a 2300 RPS with single 1150WAC power supply (C3K-PWR-1150WAC) which is connected to one 2921 Router. But it is not backing the rotuer.
Router 2921 running IOS
c2900-universalk9-mz.SPA.152-2.T1.bin
I am getting the following logs:
*** External Redundant Power Supply is present, but type is unknown or not supported.***
%ENVMON-1-POWER_WARNING: : RPS Online Insertion and Removal is not supported.
Do we required any configuration to be done on Router end.
Note: The RPS is backing 2960 Switch.
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Feb 25, 2013
I contact you due that I’m currently configuring a Router Cisco 2921 with an Etherswitch module. The specific inventory of Router Cisco 2921 is:
Router#show inventory,NAME: "CISCO2921/K9 chassis", DESCR: "CISCO2921/K9 chassis"
PID: CISCO2921/K9 , VID: V06 , SN: XXXXXXXXXXX
NAME: "High Speed WAN Interface Card - 1 Port Gigabit Ethernet on Slot 0 SubSlot 0", DESCR: "High Speed WAN Interface Card - 1 Port Gigabit Ethernet"
PID: HWIC-1GE-SFP , VID: V01 , SN: XXXXXXXXXXX"
[Code]....
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Jan 14, 2013
I have a Cisco 2921 Router,with 3 giga interfacesi have a leased line for the internet with a public ip address and i want to configure this router as NAT /PAT gateway, so that users in my network can ue the internet by the router,my wan interface is g0/0 - ip 122.xx.xx.xx lan is g 0/1 -- 192.168.1.1 /24 . i have tried doing nat once but i was not able to make the wan port up.using cisco CP when i test the interface it givves error and i dont get internet to my users.
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Oct 23, 2011
I have a trouble with PPTP VPN between Windows clients and Cisco 2921 router with RADIUS (IAS) authorization. When I try to connect to Cisco 2921 from Windows 7 using MS-CHAP v2 I receive error 778: it was not possible to verify the identity of server . Then I use PAP - everythig is OK. On Windows XP the same situation.
Cisco config:
version 15.0
service timestamps debug datetime msec
[Code].....
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Oct 2, 2011
I just got a brand new Cisco 2951 router that has built-in 3 gigabit interfaces cards. We want to add additonal 2 GE EHWIC-1GE-SFP-CU card to it. When it booted up and type show inventory, it did not detect the presence of the card. There was light on at the back of it. I have checked the compatibility on Cisco. The card is compatible with this router. Do we have to install the card with special instructions in order for the router to see it?
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Jun 5, 2012
I have installed a VWIC2-1MFT-G703 module into cisco 2921 router, I can verify the card by show inventory command. but in show run, I do not see the E1 controller card there. this card is used for TPG lease line for data only. Those card is compatible with new 2921 router? or need some extra command to bring it up?
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Sep 21, 2011
I am getting the following errow message while trying to create a VPN tunnel between an ASA5520 and a 2921 router. [code]
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Apr 4, 2011
i m planning to use the 2921 router for both mpls and internet connection , to 2 different isp also am planning to use bgp with a public providor independant
i m planning to buy sla for the mpls link
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May 16, 2012
I have one new cisco 2921 router but after first login into the new router . I have made some configuration but forget to change the default password . Now i am unable to login into the router after first log off but iam not able to recover password because the router don't have any external flash memory.
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Nov 13, 2012
If Cisco Router 2921 base load supports NAtting? I am looking to order a Router and want to make sure the new 2900 routers support Natting.
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Aug 28, 2012
I am configuring a vpn ipsec tunnel with cisco isr 2921 router and Watchguard edge 1250e. I have the watchguard configured so I just need to make sure I have everything setup on the cisco side. At this point, there is no communication as I am not sure if I configured it correctly. Should I do the crypto map on g 0/0 or dialer 1?
aaa new-model
!
!
!
!
!
!
!
aaa session-id common
!
!
no ipv6 cef
[code]......
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Nov 15, 2012
What I’m looking to do is setup a net-flow monitor for traffic going across a PIX firewall. I know unfortunately I can’t do this directly from the PIX because it does not support net-flow.
I do have a 2921 router on the same network that I have net-flow enabled to monitor traffic across the MPLS Connection.
Since the traffic for the MPLS is going out a direct interface I have applied the IP Flow egress/ingress commands to that interface to obtain the net-flow data I need. The PIX firewall however is not a direct interface so this can’t be done. I have done a little reading and believe I could use a policy map to create a “filter” so that any traffic that meets the ACL associated with the Policy-Map would get sent to net-flow monitor.
My question is how do I set that up so that so I can have the two net-flow data “streams/sources” go to separate net-flow ports so that I can monitor them independently of each other or is that not possible?
Both devices are connected to a 3750X switch; however neither is connected to a 10GB port. To my understanding that means I can’t run net-flow on the switch itself.
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Oct 6, 2012
I want to connect 2 ISP links into one Gigabit-interface on my Router 2921, can any one tell me how to do that ? sub-interface creation is not possible on cisco 2921
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Mar 27, 2013
The multicast sends out fine and is received by the distant end modems fine but the distant end router sees the same source in the RPF and picks the lowest IP address neighbor to use so the router only picks up two of the four feeds.
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Oct 16, 2012
I run an Allen & Heath digital mixer. The iDr32 mixrack sits on the stage and has a 2 port Ethernet switch on board, which allows the device to be controlled with a PC. If you then add a WiFi router then you can have wireless remote control from a laptop. Allen & Heath also sell an app for iPad to do the same. I have this working quite well although I am receiving no metering data from the Mixrack. Allen & Heath say this is probably because my router does not support multicasting. They list some routers which are recommended, but the list is rather out of date. I am trying to find a suitable dual band router with decent range on both bands. I would prefer a cable type, but since it will not be connected to the internet, it isn't important. When I Google "Multicast capable wifi router" all that comes up is a lot of stuff about video streaming. None of the manufacturers seem to list if their product supports multicasting. I understand that multicasting is usually used for video streaming, but in my case it seems to be a requirement to speed up data between the iPad and the Mixrack. Apparently some users of similar systems have encountered problems with multiple smartphone users in the audience seeking WiFi connections. The solution to this is to use 5GHz band, and switch off the SSID. Some have also found it best to use MAC filtering for security.
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