Skip to main content

Using EtherChannel for Cisco Networking

By

Using EtherChannel for Cisco Networking

Don't be afraid to use EtherChannel on your Cisco network. EtherChannel allows you to take up to eight network ports on your switch and treat them as a single larger link. This can be used to connect servers with multiple network cards that are bonded (or teamed) to a switch, or to connect multiple switches together. There are two main negotiation protocols, Port Aggregation Protocol (PAgP) which is a proprietary Cisco protocol and Link Aggregation Control Protocol (LACP) which is an open standards protocol.
To set EtherChannel to use with of the protocols you will configure it to support one of the following modes.
  • auto: Sets the interface to respond to PAgP negotiation packets, but the interface will start negotiations on its own.
  • desireable: Sets the interface to actively attempt to negotiate a PAgP connection.
  • on: Forces the connection to bring all links up without using a protocol to negotiate connections. This mode can only connect to another device that is also set to on. When using this mode, the switch does not negotiate the link using either PAgP or LACP.
  • active: Sets the interface to actively attempt to negotiate connections with other LACP devices.
  • passive: Sets the interface to respond to LACP data if it receives negotiation requests from other systems.
The following example will configure EtherChannel to use group ports 11 and 12 on the switch together using PAgP as the protocol. The same type of command would be used on the switch to which Switch1 is connected.
Switch1> enable
Switch1# configure terminal 
Switch1(config)# interface range FastEthernet0/11 -12 
Switch1(config-if-range)# switchport mode access
Switch1(config-if-range)# switchport access vlan 10
Switch1(config-if-range)# channel-group 5 mode desirable
Labels:

Comments

Post a Comment

Popular posts from this blog

Schedule Automatic backup config in Cisco Nexus

By
Schedule Automatic backup config in Cisco Nexus Nexus-Sw1(config)#feature scheduler   //Enable scheduler service in Nexus Nexus-Sw1(config)#scheduler job name backup-daily      // Job Name Nexus-Sw1(config)#scheduler aaa-authentication username abcd password abcd@123     // AAA - Authentication for Job created above (If AAA configured) Nexus-Sw1(config)#scheduler job name backup-daily copy running-config tftp://192.168.1.23/$(SWITCHNAME)-cfg.$(TIMESTAMP)         //IP of TFTP SERVER , file will saved with switch name and timestamp exit Nexus-Sw1(config)#scheduler schedule name backup-daily   // Setup Schedule to run for the JOB Nexus-Sw1(config-schedule)# time ?   daily    Specify a daily schedule   monthly  Specify a monthly schedule   start    Specify a future time schedule   weekly   Specify a weekly schedule...
Post a Comment
Read more

Duplicate IP Address has been Detected Rule

By
A duplicate IP address has been detected on the network Rule Knowledgebase Summary This rule generates an alert when Windows® detects that he local machine’s IP address is in conflict with one or more identical IP addresses on the network. Until the IP address conflict is resolved, remote clients and applications may have difficulty accessing resources on any of the effected computers. Additionally, the local computer may not be able to access network resources. Related Events This rule generates an alert whenever the following events occur and are recorded in the System Event Log: The system detected an address conflict for IP address %2 with the system having network hardware address %3. The local interface has been disabled. Source: TCPIP; Event ID: 4198; The system detected an address conflict for IP address %2 with the system having network hardware address %3. The local interface has been disabled. Source: TCP...
1 comment
Read more

Shunned packet Error on Cisco ASA Firewall

By
           Shunning/Blocking on IPS for  ASA/PIX/IOS Router Configuration Example   Advanced Threat Detection feature – This feature does a bunch of things. It detects and alerts on activity that might be related to a Denial of Service attack or Scanning reconnaissance. Optionally, the ASA can automatically shun/block hosts that are detected as a scanning threat. Threat detection also can gather threat statistics for display on the new Firewall Dashboard inside the ASDM GUI. Top 10 graphs, charts, and lists for things like access list hits, services most used, and top IP SRC and IP DST hosts are tracked. On Cisco routers and Catalyst 6500 series switches, ARC creates blocks by applying ACLs or VACLs. ACLs and VACLs apply filters to interfaces, which includes direction, and VLANs, respectively in order to permit or deny traffic. . The PIX Firewall, FWSM, and ASA do not use ACLs or VACLs. The built-in shu...
1 comment
Read more