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- About timchampion
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Member since
09-19-2006
8
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0
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1
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02-12-2015
02:50 AM
Kevin I was facing the same issue and found this: http://cciedatacentre.blogspot.co.uk/2013/01/faq-port-mirroring-span-on-nexus-2000.html Seems kind of obvious now. I guess the solution is for your traffic analyser to have a connection to each 5K and to configure an LSPAN session on each 5k. My only concern is that packets may appear out-of-order in the capture due to differences in the replication latency of each 5k.
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01-28-2015
06:39 AM
HI, does anyone know if there's a MIB supported by NXOS (5548 specifically) that returns real-time input voltage level for each PSU? Many thanks, Tim
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12-03-2012
02:27 AM
Does anyone have any documentation on the show mmls commands on a 6500, in particular show mmls igmp group?? These look like they'd be useful for troubleshooting L2 mcast issues but I can't find anything about them.. Many thanks, Tim
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04-05-2012
12:36 AM
Fabienne, thanks for the reply. Further reading suggests that PIM snooping would prevent the traffic from being forwarded on all mrouter ports. Unfortunately due to a bug that isn't an option. Below is an exmaple of a punted packet from the netdr capture taken on the distribution switch that is NOT the PIM DR for the segment: ------- dump of incoming inband packet ------- interface Vl703, routine mistral_process_rx_packet_inlin, timestamp 1w5d dbus info: src_vlan 0x2BF(703), src_indx 0x182(386), len 0x346(838) bpdu 0, index_dir 0, flood 0, dont_lrn 0, dest_indx 0xB08(2824) 68020400 02BF0400 01820003 46080000 00110520 0E000040 00000000 0B080000 mistral hdr: req_token 0x0(0), src_index 0x182(386), rx_offset 0x76(118) requeue 0, obl_pkt 0, vlan 0x2BF(703) destmac 01.00.5E.40.01.62, srcmac 00.1C.F9.09.94.00, protocol 0800 protocol ip: version 0x04, hlen 0x05, tos 0x00, totlen 820, identifier 11384 df 0, mf 0, fo 0, ttl 13, src 28.97.195.154, dst 239.192.1.98 udp src 1168, dst 8798 len 800 checksum 0x51B7
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03-23-2012
01:02 AM
I've been looking into IGMP snooping and have read that a L2 switch will forward multicast traffic to all ports connected to an interested receiver AND all mrouter ports. In a L2 'V' topology this results in all multicast traffic routed onto a VLAN being forwarded to the 2nd distribution switch. My question is how should a 6500 Sup720 deal with this unwanted multicast traffic? Both a Local SPAN of the RP and a Netdr capture suggest that this traffic is punted to the RP and ultimately dropped. Is this expected behavior or should the traffic be dropped in H/W? Cheers, Tim
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Created by
timchampion
in Optical Networking
in Optical Networking
08-22-2011
01:02 AM
08-22-2011
01:02 AM
Thanks all for your replies - I now understand why attenuators are required! Will do some reading on the 10G ethernet standard to see if a loopback will work.
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Created by
timchampion
in Optical Networking
in Optical Networking
08-19-2011
12:37 AM
08-19-2011
12:37 AM
Thanks for your reply Mike. So an attenuator is only needed when the Tx Power is potentially greater than the Rx power? Regarding your comment on the link "coming up", are you suggesting that the optic may see the link as up but that this may not be passed up the stack to the Ethernet level?
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Created by
timchampion
in Optical Networking
in Optical Networking
08-17-2011
03:43 AM
08-17-2011
03:43 AM
Hi, I'm trying to find out for sure if a X2-10GB-LR will come up when looped. If a loop is valid for this optic module is an attenuator required or any additional interface level configuration.....? Thanks in advance, Tim
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- Tags:
- loopback
- x2-10gb-lr
Labels:
02-12-2015
Kevin I was facing the same issue and found this:
http://cciedatacentre.blogspot.co.uk/2013/01/faq-p...
01-28-2015
HI, does anyone know if there's a MIB supported by NXOS (5548
specifically) that returns real-time i...
12-03-2012
Does anyone have any documentation on the show mmls commands on a 6500,
in particular show mmls igmp...
Created by
timchampion
in Switching
04-05-2012
04-05-2012
Fabienne, thanks for the reply. Further reading suggests that PIM
snooping would prevent the traffic...
Created by
timchampion
in Switching
03-23-2012
03-23-2012
I've been looking into IGMP snooping and have read that a L2 switch will
forward multicast traffic t...
08-22-2011
Thanks all for your replies - I now understand why attenuators are
required! Will do some reading on...
08-19-2011
Thanks for your reply Mike. So an attenuator is only needed when the Tx
Power is potentially greater...
Public Statistics
| Date Registered | 09-19-2006 01:46 AM |
| Date Last Visited | 10-15-2019 10:52 AM |
| Total Messages Posted | 8 |
