Quick configuration guide 6509 CATOS

Platform: - Cisco 6509 catos
Keywords: - configuring 6509, CATOS,
Author: -  Surender Singh

  1. Setting the IP address and default gateway of the switch
  1. # set int sc0 {ipaddress} {subnet mask}
  2. # set route default {ipaddress}
  1.  For setting the name of ports for each module.
  1. # set port name {mod-num/port-num} {name}
  1. For Setting the port Speed
  1. # set port speed {mod-num/port-num} auto
  1. For setting the port in half duplex or full duplex
  1. # set port duplex {mod-num/port-num} {half/full}
  1. For setting the ports for flow control for controlling the traffic or delay of traffic
  1. # set port flow control {mod-num/port-num} Send ON (the port will send Flow control to far end.)
  2. # set port flow control {mod-num/port-num} Receive ON (the port will require far end to send flow control)
  1. Port Negotiation before establishing a link

1) #  Set port negotiation {mod-num/port-num}{enable/disable}
2) #show port

  1. Clear config all will clear out all the config and all ports will collapse into VLAN1 which will cause instability. In order to avoid this all the ports are put into a blocking state.
  1. # set default port status
  1.  Configuring Ether Channels

In this all Ethernet links are grouped together to form one Ether Channel. A max of 8 Ether links can join a Admin Group. Port Aggression Protocol communicates by exchanging packets between the ports to establish a link; it adds the Ether channel to a spanning tree as one single bridge port to avoid loops.

  1. # set port channel {mod-num/port-num} {admin-group(1-1024}
  2. # set port chaneel {mod-num/port-num} { auto|desirable}

3) #set port channel all distribution {ipaddress|mac address} {source|destination}
4) # Show port channel

  1.  Configuring Spanning Tree Protocol (IEEE 802.1 d)

In a switched network only a single path must exist between two stations .Each vlan has its STP defined.
If multiple patches exists between two stations loops can occur.

STP spans the extended switch network and force certain redundant paths into a standby or blocked state if any of the link goes down then the blocked path comes into forwarding state .All switches participate in a STP by exchanging Bridge protocol data units .the BPDU contains information of the switch ,port mac-address, priority, cost. This is used to elect the root switch.

Enabling STP on VLAN

  1. # Set spantree enable {vlan_num}

Changing the port priority for putting it into forwarding state

  1. # set spantree port priority {mod-num/port-num} {priority}
  2.  # set spantree port vlan priority {mod-num/port-num} {priority} {vlan-num}

Changing the port cost

  1. #set spantree port cost {mod-num/port-num} {cost}
  2. #set spantree port vlan cost {mod-num/port-num} {cost} {vlan_num}

Configure a switch for root & secondary root

  1. #set spantree root {Vlans} dia 4
  2. #set spantree root secondary {Vlans} dia 5 hello 1

Disabling Spantree

  1. #set spantree disable

How Port Fast works

By enabling port fast the port does not wait for the STP to converge and always remain in the forwarding state

Portfast BPDU Guard

It can prevent loops by moving a non trunking port into the Errdisable state when a BPDU is received on that port. When this is enabled STP shuts down the port.

Configuring Spatree portfast

  1. #set spantree portfast {mod-num/port-num} enable
  2. #set spantree portfast bpdu-guard enable
  3. #set spantree uplinkfast enable(if the interface goes down between two switches ,uplink fast enables a blocked state interface directly into forwarding state).
  4. #set spantree backbonefast enable (it enables an indirect link into forwarding state).
  1. Configuring VTP
  1. #set VTP domain {name}
  2. #set VTP mode {server|client|transparent}
  3. #set VTP password
  4. #set VTP V2 enable
  5. #set VTP purn eligible {Vlan Range}
  6. #show trunks (verifies that appropriate Vlans are trunked)
  7. #show VTP statistics
  1. Configuring VLAN
  1. #set Vlan {Vlan number (2-1000)} name {name}

VLAN 1 is by default the inband (SC0) interface of a switch ,by which any switch can be accessed without going thru the router.

  1. #set Vlan {vlan number} {mod-num/port-num}

Valid range of Vlans for ISL is 1-1000; valid range for IEEE 802.1q is 0-4095

If non-Cisco devices r connected to Cisco devices thru 802.1q trunks, we must Map 802.1q Vlan numbers greater than 1000 to ISL Vlan numbers .802.1q vlan numbers in the range of 1-1000 r automatically mapped to ISL vlan .If greater than 1000 it has to be mapped manually to be recognized by Cisco switches. Upto 16 802.1q Vlans can be configured to ISL VLANs

  1. #SET Vlan Mapping dot1q {vlan number} ISL {Vlan number}
  1. Trunking (Important)

Configuring an ISL or dot1q trunk

  1. # set trunk {mod-num/port-num} {auto|desirable|ON|OFF} dot1q


  1. #set trunk {mod-num/port-num} desirable (mode) negotiate (dot1q or ISL) (assuming that the end port is in auto mode)

By default all Vlans are allowed when a trunk is set.
To disallow specific trunks

  1. #clear trunk {mod-num/port-num} {vlan range}
  2. # set trunk {mod-num/port-num} {vlan number or range}
  3. # sh trunk {mod-num/port-num}

Disabling Trunk port

  1. #set trunk {mod-num/port-num} OFF (turns trunking OFF on the port)
  2. #clear trunk {mod-num/port-num}  (puts the port its default trunking)
  1. GVRP: Generic attribute registration protocol

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