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- About Kevin SAS
03-02-2019
Kevin SAS
Member since
12-22-2010
Beginner
02-16-2019
02:59 PM
Hello,
I am coming here because I can't find a satisfactory response by myself in cisco documentation.
In short, I have a CCTV network with many IP cameras in the same subnet than the receivers (operator for reading video).
- Each camera is sending a mulicast flow on the network.
- I configured IGMP snooping on every switch.
- Core switch is an H3C switch with PIM DM and igmp enabled
- Receivers are connected on core switch.
I attached a small picture to understand the installation. My question is about static Mrouter configuration. I was forced to configure static mrouter to downlink in order to have the multicast working on receiver.
ip igmp snooping vlan 150 mrouter interface Gi0/0
If I don't configure that, igmp report/join request from receiver are NOT reaching the farthest switch, and mulicast flow is not sended through the link between switch. This article is explaining something similar but not the same case :
https://www.cisco.com/c/en/us/support/docs/switches/catalyst-6500-series-switches/68131-cat-multicast-prob.html
In other side, If I enable it, I am able to see all the multicast group on IGMP snooping table :
SW-SERV-TECH#sho ip igmp snooping groups Vlan Group Type Version Port List ----------------------------------------------------------------------- 150 224.0.1.60 igmp v2 Gi0/23, Gi0/24,Gi1/1, Gi1/3 150 224.16.17.1 igmp v2 Gi0/23, Gi0/24,Gi1/1, Gi1/3 150 224.16.17.2 igmp v2 Gi0/23, Gi0/24,Gi1/1, Gi1/3 150 224.16.17.3 igmp v2 Gi0/23, Gi0/24,Gi1/1, Gi1/3 150 224.16.17.4 igmp v2 Gi0/23, Gi0/24,Gi1/1, Gi1/3 150 224.16.17.9 igmp v2 Gi0/23, Gi0/24,Gi1/1, Gi1/3 150 224.16.17.12 igmp v2 Gi0/23, Gi0/24,
And I suppose all mulicast flow are flooding through interswitch link, altough I didn't make frame capture to verify that.
So is it a normal behavior ? All is configured properly and this is the expected result ? Or I am missing something in this layer 2 network ?
Thanks in advance !
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Labels:
06-26-2018
05:56 AM
Hi,
Try to reduce the following :
racl size from 512 to 256
ipv6 sup cant be changed
ipsg too
but you can also reduce egress acl and egress vacl (minimum 0)
Maybe you should reload before to increase memory for pbr.
And for this one
Because the default size of IPv4 and IPv6 TCAM regions is 0, you must carve the PBR TCAMs and reload the switch before applying PBR policy on an interface
I don't understand, where did you find it ?
HTH
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06-25-2018
06:51 PM
Hello,
I am not an expert on this subject but have you tried to reduce the others memory allocation :
show hardware profile tcam region
And reduce what is not needed for you:
hardware profile tcam region { arpacl | { ipv6-e-racl | e-racl } | ifacl | ipsg | { ipv6-qos | qos } | qoslbl | { ipv6-racl | racl } | vacl } tcam_size
Something like
hardware profile tcam region ipv6-e-racl 0
according to your version and this guide :
security guide n3k v7
According to the configuration guide in PBR section:
routing config guide v7
in prerequisites :
Because the default size of IPv4 and IPv6 TCAM regions is 0, you must carve the PBR TCAMs and reload the switch before applying PBR policy on an interface
So you should reduce the other memory alloc in order to gain memory for PBR.
Regards
HTH
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06-15-2018
01:03 PM
Hi
Can you post the result of the following command :
show version
Thanks
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06-15-2018
08:48 AM
Hi, You should try to change the group multicast out of 224.0.0.0/24. This is a reserved scope on link local subnet and equipment does not follow normal procedures of join. That's the fastest and cleanest solution. HTH
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06-14-2018
12:39 PM
Hello,
I am facing a strange issue with multicast and IGMP protocol between a 3750 and an Aruba switch.
My 3750 is the IGMP Querier on a vlan
Receiver are on this switch
I have others some cisco switch in the chain with IP camera on these and no problem with IGMP here.
My config :
SW-CSU#sho run | in igmp ip igmp snooping querier address 192.168.10.254 ip igmp snooping querier ip igmp snooping vlan 150 querier version 2 no ip igmp snooping vlan 1 ip igmp snooping vlan 150 mrouter interface Gi1/1
G1/1 is toward a Cisco switch. I use IGMP querier because I am in IPBASE IOS version so PIM is not available.
Mrouter functionnality is needed in order to forward IGMP membership report from receiver to others switchs (with IP camera as multicast sources)
If I don't configure the functionnality, the IGMP snooping table is empty.
On my switch HP, the strange issue is, when I enable the mrouter toward HP, the HP switch is loosing connectivity, I lost ping to this switch but too to the IP camera directly connected.
CPU is OK, nothing wrong in the log.
I don't where to begin with this issue, I tried with two different models of HP switch and same problem.
Does someone have idea about this issue ?
Thanks in advance
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Labels:
06-13-2018
09:52 AM
Hi @julijime
Thanks a lot for your detailled response.
I was waiting to perform some test before to validate the post.
So I did anothers tests and saw that some IP camera are sending IGMP report for their own multicast group. And the switch is reporting that like this (capture_2). You have the sender port and the uplink port where is the receiver.
For the other IP camera, I added the following command in order to have multicast flow on receiver
ip igmp snooping vlan 150 mrouter int gi 1/1
My problem was well explained here :
https://www.cisco.com/c/en/us/support/docs/switches/catalyst-6500-series-switches/68131-cat-multicast-prob.html
IGMP reports were not forwarded on others switchs unless I specified manually the mrouter port.
This is an "issue" only with IGMP querier. But my switch don't have PIM.
Have a good day
kévin
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06-07-2018
07:00 AM
Hello guys,
I am working on some multicast project with IP camera.
This is a l2 network with all camera inside, IGMP v2 enabled with querier function configured on one switch.
When I do a show ip igmp snooping group, I have only the ports where I have receiver(s). So it means receiver have send IGMP membership report with multicast IP group inside : nothing wrong here.
SW-CSU#sho ip igmp snoo grou Vlan Group Type Version Port List ----------------------------------------------------------------------- 150 224.16.18.126 igmp v2 Gi0/7, Gi0/8
In my imagination, I believe there was a message too from the source to say "hey, I am sending trafic on 224.16.18.126, please add me in the IGMP snooping table"
But it appears that I am wrong. I read the rfc and found nothing about IGMP message sended by the source.
Questions:
- Am I correct ? only receiver and routers are sended IGMP message but not the source ?
- The switch is able to recognize the source by the destination IP (and convert it in MAC )on the flow ?
I didn't find any command to find the source on the network.
Thanks in advance,
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Labels:
05-07-2018
09:03 PM
I am glad it is working now. I have no explanation right now why you need both nat statement and a little bit tired to test it (again) on lab :) I will see that another time !
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05-07-2018
08:58 PM
according to your debug, udp 73.168.*.*:64305 192.168.10.92:64305 1.1.1.1:53 1.1.1.1:53 udp 73.168.*.*:64305 192.168.10.92:64305 8.8.8.8:53 8.8.8.8:53 nat seems to be good, 73.168.139.247 is ip address on gi0/0 ? So please post a sho ip route vrf comcast
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05-07-2018
08:52 PM
If i am right, your nat should be something like this : ip nat inside source list nat-deset interface gi0/0 vrf comcast overload
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05-07-2018
08:42 PM
Can you post the result for
show ip nat translation ?
You can also try a
ip access 100 permit 192.168.10.92 0.0.0.0
debug ip packet 100
on the router, just be sure to put the good acl to match your source ip
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05-07-2018
08:24 PM
Hello,
Could you clarify some points please ?
When you said everything is working, you said, from both inside interface ? gi0/1 and gi0/2?
According to the configuration, you have 192.168.10.0 nated from gi0/1, where it is located ? from another core connected and routed through OSPF ?
From which source network are you trying? 192.168.10.0/24 ?
On Gi0/2 you are sending all internet trafic to 192.168.11.254, is that correct?
Note :Don't know if you wanna match RFC1918 networks in your ACL PBR, but this line is incorrect :
deny ip 192.168.10.0 0.0.0.255 172.30.0.0 0.0.255.255
should be : deny ip 192.168.10.0 0.0.0.255 172.16.0.0 0.15.255.255
Thanks,
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05-04-2018
07:15 PM
If you don't want reload the device, just do copy start run and it will work just fine.
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05-04-2018
06:50 PM
Hi,
However, it should work, have you already tried it ?
https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst4500/12-2/50sg/configuration/guide/Wrapper-46SG/dot1x.pdf
page 16
Don't know any other function like port-security
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02-27-2019 07:05 AM
Like this one ?:
https://sdwan-docs.cisco.com/Product_Documentation/Getting_Started/Viptela_Overlay_...
06-15-2018 08:48 AM
Hi,You should try to change the group multicast out of 224.0.0.0/24.
This is a reserved scope on lin...
06-14-2018 12:39 PM
Hello, I am facing a strange issue with multicast and IGMP protocol
between a 3750 and an Aruba swit...
06-07-2018 07:00 AM
Hello guys, I am working on some multicast project with IP camera. This
is a l2 network with all cam...
05-07-2018 09:03 PM
I am glad it is working now.I have no explanation right now why you need
both nat statement and a li...
05-07-2018 08:58 PM
according to your debug, udp 73.168.*.*:64305 192.168.10.92:64305
1.1.1.1:53 1.1.1.1:53udp 73.168.*....
05-07-2018 08:52 PM
If i am right, your nat should be something like this :ip nat inside
source list nat-deset interface...
05-07-2018 08:42 PM
Can you post the result for show ip nat translation ? You can also try a
ip access 100 permit 192.16...
05-07-2018 08:24 PM
Hello, Could you clarify some points please ? When you said everything
is working, you said, from bo...
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| Date Registered | 12-22-2010 12:58 PM |
| Date Last Visited | 03-02-2019 07:32 PM |
| Total Messages Posted | 75 |
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