Catalyst 6500 Series Switch SIP, SSC, and SPA Software Configuration Guide

Overview of the Fast Ethernet and Gigabit Ethernet SPAs

This chapter provides an overview of the release history, and feature and Management Information Base (MIB) support for the Fast Ethernet and Gigabit Ethernet SPAs on the Catalyst 6500 Series switch.

This chapter includes the following sections:

•Release History

•Supported Features

•Restrictions

•Supported MIBs

•SPA Architecture

•Displaying the SPA Hardware Type

Release History

Supported Features

The following is a list of some of the significant hardware and software features supported by the Fast Ethernet and Gigabit Ethernet SPAs on the Catalyst 6500 Series switch:

•Autonegotiation

•Full-duplex operation

•802.1Q VLAN termination

•Jumbo frames support (9188 bytes)

•Support for command-line interface (CLI)-controlled OIR

•802.3x flow control

•Up to 4000 VLANs per SPA

•Up to 5000 MAC Accounting Entries per SPA (Source MAC Accounting on the ingress and Destination MAC Accounting on the egress)

•Per-port byte and packet counters for policy drops, oversubscription drops, CRC error drops, packet sizes, unicast, multicast, and broadcast packets

•Per-VLAN byte and packet counters for policy drops, oversubscription drops, unicast, multicast, and broadcast packets

•Per-port byte counters for good bytes and dropped bytes

•Any Transport over MPLS over GRE (AToMoGRE)

•Ethernet over Multiprotocol Label Switching (EoMPLS)

•Quality of service (QoS)

•Hot Standby Router Protocol (HSRP)

•Virtual Router Redundancy Protocol (VRRP)

•Hierarchal Virtual Private Lan Service (H-VPLS)

•Multipoint Bridging

Restrictions

Note For other SIP-specific features and restrictions see also Chapter 3, "Overview of the SIPs and SSC" in this guide.

The following restrictions apply to Cisco IOS Release 12.2(18)SXF:

•EtherChannel is not supported on Fast Ethernet SPAs or the 2-Port Gigabit Ethernet SPA on the Cisco 7600 SIP-400.

Supported MIBs

The following MIBs are supported by the Fast Ethernet and Gigabit Ethernet SPAs on the Catalyst 6500 Series switch:

•Entity-MIB (RFC 2737)

•Cisco-entity-asset-MIB

•Cisco-entity-field-replaceable unit (FRU)-control-MIB

•Cisco-entity-alarm-MIB

•Cisco-entity-sensor-MIB

•IF-MIB

•Etherlike-MIB (RFC 2665)

•Remote Monitoring (RMON)-MIB (RFC 1757)

•Cisco-class-based-QoS-MIB

•MPLS-related MIBs

•Ethernet MIB/RMON

To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL:

http://tools.cisco.com/ITDIT/MIBS/servlet/index

If Cisco MIB Locator does not support the MIB information that you need, you can also obtain a list of supported MIBs and download MIBs from the Cisco MIBs page at the following URL:

http://www.cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtml

To access Cisco MIB Locator, you must have an account on Cisco.com. If you have forgotten or lost your account information, send a blank e-mail to cco-locksmith@cisco.com. An automatic check will verify that your e-mail address is registered with Cisco.com. If the check is successful, account details with a new random password will be e-mailed to you. Qualified users can establish an account on Cisco.com by following the directions found at this URL:

http://tools.cisco.com/RPF/register/register.do

SPA Architecture

This section provides an overview of the architecture of the Fast Ethernet and Gigabit Ethernet SPAs and describes the path of a packet in the ingress and egress directions. The SPA software references some of these architecture areas. Understanding the architecture is helpful when troubleshooting or interpreting the SPA CLI and show command output.

Every incoming and outgoing packet on the Fast Ethernet SPAs goes through the physical port (PHY RJ-45), the Media Access Controller (MAC), and a Layer 2 Filtering/Accounting ASIC. Every incoming and outgoing packet on the Gigabit Ethernet SPAs goes through the physical (PHY) SFP optics, Media Access Control (MAC), and ASIC devices.

Path of a Packet in the Ingress Direction

The following steps describe the path of an ingress packet through the Fast Ethernet or Gigabit Ethernet SPAs:

1. For Fast Ethernet SPAs, each of the ports receives incoming frames from one of the RJ-45 interface connectors. For Gigabit Ethernet SPAs, the SFP optics receive incoming frames on a per-port basis from one of the optical fiber interface connectors.

2. For Fast Ethernet SPAs, the PHY device processes the frame and sends it over a serial interface to the MAC device. For Gigabit Ethernet SPAs, the SFP PHY device processes the frame and sends it over a serial interface to the MAC device.

3. The MAC device receives the frame, strips the CRCs, and sends the packet via the SPI 4.2 bus to the ASIC.

4. The ASIC takes the packet from the MAC devices and classifies the Ethernet information. CAM lookups based on Ethernet type, port, VLAN, and source and destination address information determine whether the packet is dropped or forwarded to the SPA interface.

Path of a Packet in the Egress Direction

The following steps describe the path of an egress packet from the SIP through the Fast Ethernet and Gigabit Ethernet SPAs:

1. The packet is sent to the ASIC using the SPI 4.2 bus. The packets are received with Layer 2 and Layer 3 headers in addition to the packet data.

2. The ASIC uses port number, destination MAC address, destination address type, and VLAN ID to perform parallel CAM lookups. If the packet is forwarded, it is forwarded via the SPI 4.2 bus to the MAC device.

3. For Fast Ethernet SPAs, the MAC device forwards the packets to the PHY RJ-45 interface, which transmits the packet. For Gigabit Ethernet SPAs, the MAC device forwards the packets to the PHY laser-optic interface, which transmits the packet.

Displaying the SPA Hardware Type

To verify the SPA hardware type that is installed in your Catalyst 6500 Series switch, you can use the show interfaces command. For more information about these commands, see the Catalyst 6500 Series Cisco IOS Command Reference, 12.2SX.

Table 9-1 shows the hardware description that appears in the show command output for each type of Gigabit Ethernet SPA that is supported on the Catalyst 6500 Series switch.

Example of the show interfaces Command

The following example shows output from the show interfaces gigabitethernet command on a Catalyst 6500 Series switch with a 2-Port Gigabit Ethernet SPA installed in slot 2:

Router# show interfaces gigabitethernet 2/0/1

GigabitEthernet2/0/1 is down, line protocol is down 

  Hardware is GigEther SPA, address is 000a.f330.2e40 (bia 000a.f330.2e40)

  Internet address is 2.2.2.1/24

  MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec, 

     reliability 255/255, txload 1/255, rxload 1/255

  Encapsulation ARPA, loopback not set 
  Full-duplex, 1000Mb/s, link type is force-up, media type is SX

  output flow-control is on, input flow-control is on

  ARP type: ARPA, ARP Timeout 04:00:00

  Last input 03:19:34, output 03:19:29, output hang never

  Last clearing of "show interface" counters never

  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0

  Queueing strategy: fifo

  Output queue: 0/40 (size/max)

  5 minute input rate 0 bits/sec, 0 packets/sec

  5 minute output rate 0 bits/sec, 0 packets/sec

     1703 packets input, 638959 bytes, 0 no buffer

     Received 23 broadcasts (0 IP multicasts)

     0 runts, 0 giants, 0 throttles

     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

     0 watchdog, 1670 multicast, 0 pause input

     1715 packets output, 656528 bytes, 0 underruns

     0 output errors, 0 collisions, 4 interface resets

     0 babbles, 0 late collision, 0 deferred

     0 lost carrier, 0 no carrier, 0 PAUSE output

     0 output buffer failures, 0 output buffers swapped out

.

.

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The following example shows output from the show interfaces tengigabitethernet command on a Catalyst 6500 Series switch with a 1-Port 10-Gigabit Ethernet SPA installed in slot 7:

Router# show interfaces tengigabitethernet7/0/0

TenGigabitEthernet7/0/0 is up, line protocol is up (connected)

  Hardware is TenGigEther SPA, address is 0000.0c00.0102 (bia 000f.342f.c340)

  Internet address is 15.1.1.2/24

  MTU 1500 bytes, BW 10000000 Kbit, DLY 10 usec, 

     reliability 255/255, txload 1/255, rxload 1/255

  Encapsulation ARPA, loopback not set

  Keepalive not supported

  Full-duplex, 10Gb/s

  input flow-control is on, output flow-control is on 

  ARP type: ARPA, ARP Timeout 04:00:00

  Last input never, output 00:00:10, output hang never

  Last clearing of "show interface" counters 20:24:30

  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0

  Queueing strategy: fifo

  Output queue: 0/40 (size/max)

  5 minute input rate 0 bits/sec, 0 packets/sec

  5 minute output rate 0 bits/sec, 0 packets/sec

  L2 Switched: ucast: 0 pkt, 0 bytes - mcast: 0 pkt, 0 bytes

  L3 in Switched: ucast: 0 pkt, 0 bytes - mcast: 0 pkt, 0 bytes mcast

  L3 out Switched: ucast: 0 pkt, 0 bytes mcast: 0 pkt, 0 bytes

     237450882 packets input, 15340005588 bytes, 0 no buffer

     Received 25 broadcasts (0 IP multicasts)

     0 runts, 0 giants, 0 throttles

     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

     0 watchdog, 0 multicast, 0 pause input

     0 input packets with dribble condition detected

     1676 packets output, 198290 bytes, 0 underruns

     0 output errors, 0 collisions, 4 interface resets

     0 babbles, 0 late collision, 0 deferred

     0 lost carrier, 0 no carrier, 0 PAUSE output

     0 output buffer failures, 0 output buffers swapped out