Eric Yu (CCIE 14590) is a customer support engineer at Cisco responsible for supporting video performance on Cisco Borderless Network solutions. He has 10 years of experience in the telecommunications industry designing data and voice networks. Previous to his current role, he worked as a network consulting engineer for Cisco Advanced Services, responsible for designing and implementing Cisco Unified Communications for Fortune 500 enterprises. Eric holds CCIE certification on routing and switching.
Technical Leader Micheal O'Brien was helping Eric to answer few of the questions asked during the session.
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A. In order to know the minimum Cisco IOS software release for using medianet feature, refer to Cisco Networking Capabilities for Medianet for more information on the data sheet. In order to run medianet you need to have combination of both hardware and software. Medianet runs only on specific hardware at this point of time and on each specific hardware platform there is minimum requirement such as software licenses that needs to be activated for some of the features to work.
A. Yes. You can use Medianet for other apps besides Telepresence such as switches traffic and mare traffic. You can use class-maps in order to define the traffic classes and then you can apply, for example, performance monitor or mediatrace services.
A. The Medianet mediatrace performance monitor is available on 891 series routers.Refer to Cisco Networking Capabilities for Medianet for the data sheet and a more comprehensive list of supported routers.
A. In order to build this lab, I used a pair of Catalyst 6500 switches.
Note: This question is based on network diagram used in the presentation.
A. Good questions! Metadata helps solve this issue by the assignment of QoS by Application ID rather than using other ACL classifications.
A. Medianet is not supported on the N5K yet, and I believe it is on the roadmap but there are no dates yet. The ASR1K can support Medianet and most of the features to which Eric refers. Refer to our data sheet for platform dependencies. Use our design guide.
Note: This question is based on slide number 15 in the presentation.
A: Yes. Refer to Cisco Networking Capabilities for Mediane for more information in the data sheets.
A. Yes. No extra cost for Medianet specific features and long as you have new Cisco IOS images (Cisco IOS Software Release 15.1.3T or later) on ISR's and have enterprise level image.
A. 5-tuple = IP source and destination addresses and port numbers (4) and the IP protocol type for UDP is 17.
A.Yes, Nexus platforms are on the roadmap, but I cannot provide you dates just yet.
A.Cisco Prime Collaboration Mgr - fully supports all video monitoring features including Perf-Mon, Mediatrace, and IPSLA-VO. Nearly all Tandberg endpoint are support with CPCM today and more capabilities available in the next release like MSI and Metadata.
A.The 6500 currently supports Performance Monitor and Mediatrace with Cisco IOS Software Release 15.0(1) SY or later. 6500 does not support Metadata today, but it is on the roadmap.
A. This is answered in the Ask the Expert event.
A. This is answered in the Ask the Expert event>.
A. Mediatrace uses RSVP as a transport mechanism. RSVP uses IP protocol 46. So be sure that you have IP protocol 46 allowed. If the IP protocol 46 gets denied anywhere, the mediatrace messages stops at the point where it was actually filtered. You only get mediatrace report up to that device hop that dropped the message.
A. That is really a good question. If I don not want my first year help desk guy to trace the sessions, you can always use AAA authorization to define the user level access.
A.You do not have to have medianet features installed everywhere on your network for the mediatrace to work. If the devices in a network do not support mediatrace, those routers treat the RSVP messages like any other type of IP packets. The routers that do not support mediatrace are not able to interpret RSVP messages and it drops the packet like any other data packet. From the concept perspective, when you get the final printout of what performance is like for every single hop, when you get to that devices which does not understand mediatrace, you essentially get an IP address like a quick lift that tells that media path took these network device hops from point A to point B and one hop does not support mediatrace. It uses traceroute to detect that IP address, the specific hop in the network.
A. If you are referring to Metadata, then you can setup authentication if you wish, by default it is not required to make Flow Metadata work. But you can set it up for added security.
A.Perf-Mon and Mediatrace scales very well. You have safe guards, which can limit Maximum number of flows to monitor or Mediatrace sessions. See the configuration guide for more details.
A. Yes.The main advantage of Mediatrace is that it shows the DSCP marking on departure of the CE and then arrival on the CE at the other end, which is highly useful in troubleshooting MT. However, it does not show in the middle unless the PE is enabled.
A. Mediatrace only provides performance stats for devices that are Medianet enabled. So unless the SP enables mediatrace within their own network, Mediatrace passes-thru the SP network safely unless the SP blocks RSVP or NAT is used.
A. At this time the ASA does not support Mediatrace, and to my knowledge I have not seen this on the roadmap for the ASA.
A. Cisco does not support Mediatrace on the NX-OS platforms yet, but it is on our roadmap for a future release.
A. Just IP (RSVP) protocol type 46. However Mediatrace breaks when using NAT, which does address translation.
A. RSVP refreshes Metadata every 30 seconds, so the state is refreshed in 30-sec intervals. You can enable Metadata on specific interfaces to limit the number of flows being monitored.
A.This is answered in the Ask the Expert event
A. One way to restrict how metadata flow messages propagate to the network is essentially by turning on metadata flow for specific interface. For example, if in a router that has 3 interfaces, if you want to restrict the metadata flow only on 2 interfaces, it can be done if you turn on metadata flow on those specific interface and not globally. It is more of a policy on how you control the metadata signal messages.
A. From Cisco's prospective Jabber 9.0, Cisco WebEx and some of the Telepresence running new firmware are supported. Refer to NBAR2 Protocol Library for a more complete list of applications.
A. In a multi-site environment that the WAN support QoS, sometimes it is best to apply QoS at the WAN edge rather than the access layer.
A. Eric did not answer the question since it requires understanding of specific scenario of this question.
A. The Media Services Interface (MSI) is a software development kit that Cisco rich-media applications such as the Cisco WebEx Meeting Client, Cisco Jabber for Windows, the Cisco Video Surveillance 4500 IP Camera. Visit Cisco CDN site for more details.
A. The system Media Services Interface (MSI) essentially is an API that the application developer can leverage. For example, a WebEx application developer knows MSIs and it is up to the developer to leverage what MSIs can offer and announce in to the network. For time being MSIs are not open to the developer community yet and it is applied for specific Cisco end points at this point of time.