A 2960G switch is doing IGMP snooping and is configured as the querier. There is no multicast routing.
Port 1 - Video Set Top Box A
Port 2 - Video Set Top Box B
Port 3 - Multicast Source
Both Set Top Boxes A & B are set to receive the video delivered in the same multicast group.Every 60 seconds the switch generates an IGMP General Query message which is sent out all the ports in the VLAN.There is a 10 second timeout in the Query message. Devices that wish to join (or remain joined) to the multicast group have this amount of time to respond with a Join Message directed at the multicast group. Devices deliberately wait a random duration within the timeout time before replying.
For some reason (which I don't understand), if the switch receives a Join request message from a Set Top Box, it forwards that messages out of the port to the other Set Top Box. So, let's say Box A responded with the Join Message first. Box B now sees the Join message and now thinks there is another multicast receiver on its branch of the network, so it suppresses its Join Message to avoid sending an unnecessary message.If by chance Box A responds first 2 or 3 times in a row, the switch will not have seen a response from port 2 for awhile, so it prunes that port from the multicast. Eventually, Box B responds first and gets re-joined onto the multicast. It is now Box A that may get pruned if it is consecutively slower.
How do I prevent the switch from replicating the Join message out to the other Set Top Box? I have verified this behavior with Wireshark. But, I believe the Join message is only supposed to be forwarded to a multicast router (if there is one - and there isn't), not to other ports.The 2960 is running 12.2(58) SE2.
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.
I am working on Multicast scenario, There is one 6513E switch one 2960 switch. Two VRF's are configured in core switch (6513) IPTV-SRV and Villa-VRF IPTV-SRV vrf has IPTV server and Villa-VRF has IPTV i.e. client.
V LAN 30 is mapped to IPTV-SRV vrf with subnet address 192.168.30.0/24 V LAN 12 is mapped to Villa-VRF with sub net address 192.168.12.0/24
I did the following configuration for VRF but its not working . i am not an expert in multicast design but seems i did most of the configs.
We found out that only local multicast ip address range is not passing between the sites, any other range is passing, local range is 239.0.0.0 and above.
We have two different datacenters, the internal switch is 2960S (Stacked) with 1-10 vlans and the external switch is 3560E, the external switch is adding another tag (qinq, dot1q), vlan 611, and send the packets to metro line to the other site.
on the other site we have the same configuration.
internal switch from site A is configured with igmp querier and the internal switch port on site B connected to the external switch is configured as mrotuer port.
multicast and igmp is passig between the sites, but the local multicast range is not passing, igmp filterring is configured on all port but no profile is defined and no ports are filterred, on the external switch igmp snooping is disabled.
I have quite a few 2960's in a manufacturing environment that are experiencing a large number of Total Output Drops. The gigabit uplinks arn't even close to fully subscribed and if I'm lucky they run at a peak of 4 - 5 Mb on a 1Gb uplink. Something really funky is going on. The individual switchports seem to have the total output drops and the uplinks at 1Gb do not have any output drops and never peak above 20Mb over a 3 month span on a 1Gb link.
why the QoS deployment causes ports on 2960 switches to drop packets although there is no bandwidth contension? (output bit/second of the interface)packet drops at threshold 1, queue 2 ( queue 3 in config)
We are using Catalyst 2960 switches and are experiencing issues with QoS. After the QoS, we experience a lot of packet drops and it make the network slow. It appears that the slow performance relates to the egress queuing of each port.
Cisco IOS Software, C2960 Software (C2960-LANBASEK9-M), Version 12.2(50)SE5 WS-C2960-48TT-L
switch_06#show inter fa0/1 | in drops|queue|output input flow-control is off, output flow-control is unsupported Last input never, output 00:00:01, output hang never
I have a Catalyst Switch that is been used as a SAN switch providing ISCSI connection for servers.The total output drops of the interfaces connected to the SAN and some connected to the servers keep increasing.
Example below:
SWESAN1-1#sh interfaces gigabitEthernet 0/1 GigabitEthernet0/1 is up, line protocol is up (connected) Hardware is Gigabit Ethernet, address is ec44.763c.8f01 (bia ec44.763c.8f01)MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec, reliability 255/255, txload 1/255, rxload 5/255Encapsulation ARPA, loopback not setKeepalive set (10 sec)Full-duplex, 1000Mb/s, media type is 10/100/1000BaseTXinput flow-control is off, output flow-control is unsupported ARP type: ARPA, ARP Timeout 04:00:00Last input never, output 00:00:08, output hang neverLast clearing of "show interface" counters 03:25:04Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 78Queueing strategy: fifoOutput queue: 0/40 (size/max)5 minute input rate 22322000 bits/sec, 2171 packets/sec5 minute output rate 5155000 bits/sec, 1487 packets/sec20441503 packets input, 23941254166 bytes, 0 no bufferReceived 0 broadcasts (0 multicasts)0 runts, 0 giants, 0 throttles0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored0 watchdog, 0 multicast, 0 pause input0 input packets with dribble condition detected16323602 packets output, 9608971046 bytes, 0 underruns0 output errors, 0 collisions, 0 interface resets0 babbles, 0 late collision, 0 deferred0 lost carrier, 0 no carrier, 0 PAUSE output0 output buffer failures, 0 output buffers swapped out
i noticed the "output drops" increasing in interface gi 1/0/1 in my switch 2960-S although the utilization of my interface is between 20% and 50 %
SW__A#sh interfaces gigabitEthernet 1/0/1 GigabitEthernet1/0/1 is up, line protocol is up (connected) MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec, reliability 255/255, txload 93/255, rxload 3/255 Encapsulation ARPA, loopback not set Keepalive set (10 sec)
I have an existing stack of 4 x 2960-S switches connected by stack cables.I would like to add another 2960-S switch to the stack but am unable to as the 2960-S will only allow 4 x 2960-S switches per stack.how I would add the 5th 2960-S switch to the existing stack of 4 x 2960-S switches.
I have a 24 port 2960-S that is not communicating with a 2960-LST that it is directly connected to over fiber. The link is up on the LST but will not come up on the -S. What command should I use to bring up this link? I have tried no shut from the (Config-if)# prompt.
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]
is it possible to block outgonig multicast L2 frames on an Ethernet port in outgoing direction on a 2960 Switch?
I tried the "switchport block multicast" command, but the description of this feature relates to only "unknown" multicast!?
But what means "unknown multicast"? Even if activated, I see a lot of multicast traffic going out that port: IGMP, PIM, SSDP, HSRP, OSPF, .. and also pings and VLC streams to multicastaddresses (ip igmp snooping disabled).
I also tried to map a "mac access-list" to that port, but the "mac access-group" interface command is restricted to only incoming traffic.
Reason: we assume, that there are a couple of specific enddevices, that might react strange to some multicast. Therefor we would like to block outgoing multicast on that specific ports.
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:
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:
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.
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 ?
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.
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)
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.
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.
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
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).
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]....
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
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.
I'm trying to configure multicast between 2 VLANs on a Cisco 886VA running IOS 15.2 (3) T1 (advanced security). While I can set the global "ip multicast-routing" I cannot "ip pim sparse-mode" on my interfaces - ip pim is actually unknown and also doesn't appear in the interface's ip subcommand list when using "?".
The feature navigator says pim is supported on my platform and IOS version.
My config looks like this:
interface FastEthernet3 switchport access vlan 103 no ip address
I recently created a stack using (2) 3750x switches. I have three vlans on the stack (1,105,241) Vlan 105 is configured on 6509 core switches with multicasting and are connected to the stack via gigabit fiber. It is working well with clients on the Master or SW1, however clients on SW2 do not participate in multicasting Any client pc that is connected to SW2 vlan 105 does not show up in the "sh ip igmp snooping group" command. I can statically assign a client on SW2 to the mcast groups but but they fail to register on their own. I can take the cable connection from SW2 and plug it into an SW1 Vlan 105 port and it immediately becomes a member of the groups. I can then connect it back to the SW2 port and it disappears from the group membership. IGMP and PIM are configured with the defaults.
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.
I have the need to filter multicast between vlans as described below. PIM Sparse-Mode is being utilized for this multicast network and changing any Vlan to PIM Dense mode is not an option.
- Vlan 217 and Vlan 4 should not be communicating on mcast with any other vlan, including eachother (each vlan isolated).
-Vlan 64 and Vlan 80 are able to communicate witch each other on mcast but not with any other vlans (isolated vlan group).
-All other vlans can communicate mcast freely.
What I've created thus far is below. It does not appear to be the most elegant solution and would be difficult for the administrators to adjust as new requirements come along. Yes, I will be adding the appropriate link-local multicast addresses so as to not break routing and other dependent technologies.
ip access-list ext ANY_CONN permit ip any any ip access-list ext MCAST_INTRA_217 permit ip 224.0.0.0 15.255.255.255 133.106.197.32 255.255.224.0 permit ip 133.106.197.32 255.255.224.0 224.0.0.0 15.255.255.255 ip access-list ext MCAST_ISOLATE
I hve the above setup and I need to setup multicast between the 2 servers. The nexu7k is a layer 2 switch and the 6500 is a lyer3.Both servers would be sending/receving traffic.
I've been handed a requirement to try and get a multicast server working on my setup. Trouble is, I don't know if I can with the feature set I have on my switches. What is desired is that a multicast server (stand alone, but network connected, obviously) be accessible by everyone on the local network (multiple V LAN's, multiple SVI's) in the building.
All users will be connected to the one switch stack, although some will want to be wireless (which is one of the separate V LAN's) - I don't care if the wireless requirement goes by the wayside - they can sod off. :-) The main purpose will be multicast, high quality video.
I have a single switch stack consisting of two (soon to be 3) WS-C3750X-48P switches running the IP BASE feature set.
Question - can I do this on IP BASE, or do I need to upgrade to IP SERVICES?
If I can do it on IP BASE, does anyone have any links/pointers to setup this properly? Currently installed IOS is 12.2(58)SE2.
pinging the SVI on the core and or pinging on the core to other devices resulted in MAJOR latencies, packet loss due to the cpu usage, etc.... no other network operations were affected, i could communicate with the rest of the network, and under 1-2ms latencies. i noticed it due to my opsview server flagging the core as down (SNMP OID's wouldnt return a value)
it lasted the whole time i was multicasting, i kept a close eye on it. i highly considered canceling my job, but everything ran smooth.when i looked at the cpu sorted history i saw 2 processes, IP Input, and cat4k mgmnt hipri
I have a 2960G that I keep on the bench as a work switch. I assigned an IP address to it. The techs have had trouble imaging workstations using GHOST. Do any config changes need to be made to enable multicast to work? Everything is in VLAN1 at this point and the GHOST server is also the DHCP server.
