03-19-2014 02:06 PM - edited 03-01-2019 05:02 PM
With Richard Michael and Somu Jayaraman
During the live event, Cisco subject matter experts Richard Michael and Somu Jayaraman focused on troubleshooting switching issues with the Cisco Catalyst 6500 and the architecture of the latest hardware in the Cisco Catalyst 6500 family series, Sup2T and 6800I. They will also cover common problems when migrating from Sup720 to Sup2T and introduce the latest troubleshooting tools for some common problems such as high CPU, Netflow issues, QoS, and CEF troubleshooting.
You can download the slides of the presentation in the attached document.
Richard Michael Michael is an engineer with technical services at the Cisco TAC center in Bangalore, India. He has approximately seven years of industry experience. Richard's areas of expertise include LAN switching and data center products such as Cisco Catalyst 6500, 4500, 3750, and 2960 and Cisco Nexus 7000, 5000, and 2000 Series Switches. His current responsibilities include working closely with the EMEA partners, service providers, and enterprise customers. Richard is also responsible for developing content for data center products both for internal and external use. He holds a degree in electronics from St. Joseph's College.
Somu Jayaraman is a customer support engineer with the Cisco TAC Center in Bangalore, India. He has six years of industry experience, and his areas of expertise include LAN routing and switching and data center technologies. Somu has been involved in various escalation requests from India, Singapore, and Australia and is currently working as a technical lead for the LAN switching team in Bangalore, India. He holds a degree in electronics and communication engineering from Anna University.
Q. What is the Purpose of Access-List Entry (ACE) Counter?
A. The ACE counter is used in order to maintain the Access-List (ACL) statistics.
Q. Is a 40-Gb module supported on a Supervisor Engine 2T (SUP2T), and what is the model number of the line card if it is?
A. A. Yes. A 40-Gb module is supported on SUP2T, and the model number of the line card is WS-X6904-40G-2T. For more information about this, reference the Cisco article below.
40 Gigabit Ethernet on Cisco Catalyst 6500 Series Switches: How It Works
A. The SUP, or Supervisor Engine, is basically the brain of the switch and is responsible for 12/13 packet forwarding.
A. The CAT6k Series Switches used to run Cisco CATOS, which is now unsupported. These switches now run Cisco IOS and IOS-XE.
A. Yes. The packet headers are sent to the forwarding engine for decisions.
A. The packet forwarding decision depends upon the type of ingress module in the switch. For modules with DFC, the decision is made on the line card itself.
A. In order to change the baud rate in the SUP2T, you must enter rommon>confreg mode. Once you are in this mode, you see these options:
A. The CMP is a different processor and has its own bootflash/RAM. An Ethernet port is available on the front panel of the SUP.
A. In order to block L3 broadcasts from the CPU, add a rate-limiter and Control Plane Policy (CoPP) to the switch.
A. The PPS rate is in the millions. The PPS is a function of the packet size, which means smaller packets at the same line rate.
A. The fabric utilization varies with the traffic pattern and services that run on the box.
A. Reference the Cisco Catalyst 6500 Series Supervisor Engine 2T Data Sheet for information about the line cards that are supported on the SUP2T.
Q. What is Embedded Logic Analyzer Module (ELAM)?
A. The ELAM is a tool that is used in order to find the hardware packet forwarding decision.
Q. Is CoPP enabled by default on SUP2T?
A. Yes. CoPP is enabled by default. If there are any silent packet drops, you can check the CoPP with the show platform control-plane policy command.
A. Reference the "Ask the Expert" discussion for more information.
A. Some rate-limiters are enabled by default, but not all. Enter the show platform rate-limit command in order to view the list of rate-limiters.
A. Failover occurs quickly, and there is no network outage, even if the master stack member uplink ether channel goes down.
6800IA (Instant Access) and FEX related Questions
A. Support for 2000 access ports is targeted in Release 15.2(1)SY, which has an anticipated release date of December 2014. This is still in the testing phase, and details will be available in April 2014. The goal is to support 2000 ports with both SUP2T and 6880-X.
A. Reference the "Ask the Expert" discussion for more information.
A. You can build a fabric path over a CAT6k Series Switch, but the supervisor engine must be SUP2T with a 6800IA. The 6800I cannot work as a standalone switch.
A. The CAT6k SUP2T is not a TRILL-based platform, so it does not support fabric paths. However, the Cisco Nexus 7000 Series Switches use TRILL-based platforms, so they do support fabric paths.
A. Reference the "Ask the Expert" discussion for more information.
A. You can add up to seven nodes, and each node carries three 6848 IA stack members.
A. Only trust DSCP is currently supported by the ports.
A. There are four queues in the 6848 platform: one is a priority queue, and the others are standard queues. The priority queue only carries control plain traffic, such as <expand this acronym> (BPDU). All of the standard queues are used for normal traffic.
A. Yes. The ISSU feature is supported on a 6848IA client and we can used during an IOS upgrade.
A. No. The uplink port will not be block and it is always in the forwarded state.
Webcast Related Links:
HI,
Does Cisco Switches, like 6500 series, support TRILL configuration?
Thanks,
Masood
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