Hi Kevin, AFAIK HSRP does not work on 2900XL/3500XL switch. Regards, Ankur ... View more

Hi Shahid, As I told you in my previous posts you cannot compare etherchannel with RSTP. Both are different technologies and are used for different purposes. Only thing you can configure in etherchannel is the way it perform loadbalancing. You can also configure PAgP Learn Method and Priority and LACP port priorities and Configuring Hot Standby Ports. Have a look at this link http://www.cisco.com/univercd/cc/td/doc/product/lan/cat2950/12113ea1/2950scg/swethchl.htm#1057322 You cannot do anything more in etherchannel. Regards, Ankur ... View more

Hi Carl, If you have configured your switch 3550 itself as a DHCP server for all the clients residing in specific vlans then you do not need "ip helper-address" command. But incase you are having an external DHCP server like windows connected somewhere on your network then you need this command to relay DHCP request to the DHCP server. You need this command with the ip address of the DHCP server. I will request you to start rating helpful post. HTH Ankur ... View more

Hi Ali, To delete file from bootflash issue the command "delete bootflash: " and to delete it from slot0 issue the command "delete slot0: " Once delete command is issued you have to run squeeze command to permanenetly delete it from flash devices and get the space freed up and the command will be "squeeze slot0:" or "squeeze bootflash:" Deleteing the file from flash device will not have any affect on tftp server connection. The connection from tftp server will be maintained unless and untill physical connection is not disturbed and configuration are not disturbed or changed. HTH Ankur ... View more

Hi Carl/Devang, Yes if you have 2 physical interfaces you can configure HSRP on both the interfaces. Both the interfaces should have HSRP peers on some other routers thats mandatory. Concept of HSRP is that there is no active router but there is an active interface on a router. So you can configure a router in such a way that one interface one router is active for an HSRP group and another interface on same router can be standby for another HSRP group. But yes if you want both the interface on same router to be active for thir individual HSRP group you can configure them with higher priority as in your case priority 110 and make both the interfaces them active. Appreciate if you rate the post. HTH Ankur ... View more

Hi Carl/Devang, Yes if you have 2 physical interfaces you can configure HSRP on both the interfaces. Both the interfaces should have HSRP peers on some other routers thats mandatory. Concept of HSRP is that there is no active router but there is an active interface on a router. So you can configure a router in such a way that one interface one router is active for an HSRP group and another interface on same router can be standby for another HSRP group. But yes if you want both the interface on same router to be active for thir individual HSRP group you can configure them with higher priority as in your case priority 110 and make both the interfaces them active. Appreciate if you rate the post. HTH Ankur ... View more

Hi Vicky, Can you please confirm if the downstream switch is same for all the interface which you have mentioned and if yes than the ports in downstream switch are in which vlan? As you mentioned on main switch port 11 is in vlan 107, port 13 is vlan 103 and they both connectes to downstream switch. What I want to know is that if the downstream switch for both the ports are same and if yes what vlan the downstream ports are configured for which are connected for upstream main switch? If the downstream switch ports conneted to port 11 and port 13 on main switch are in vlan 101 then it is the expected behavior. Regards, Ankur ... View more

Hi Devang, I think you have intercepted my post in different way. Actually what I want to say is the way we configure HSRP on a layer 3 switch for different logical interface or subnets same way we can configure HSRP on router for 2 different physical interfaces. I mean if I have 2 subnets configured on 2 physical interfaces on same router they both can have HSRP for gateway redundancy but they need to have HSRP peer on some other router also. I hope I am able to clear my point. Ankur ... View more

Hi Carl, In this situation if you have secondary address configured on your router interafce then you need to have hsrp standby address also in same subnet with secondary keyword and you do not need subnet mask for standby address because it will presume itself to be in the same subnet which is there for ip configured on physical interface. Something like this standby ip 10.1.1.2 secondary Have a look at this link http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fipras_r/1rfip2.htm#wp1096178 Appreciate if you start rating the post. Ankur ... View more

Hi Carl, Depends on your requirement. As they are 2 different physical interfaces they will be in different subnets also. So if you want to have redundancy and loadsharing for both the subnets or both the interfaces you can configure HSRP for both the interfaces on routers and if thats not your requirement you can go ahead with one interface. What I mean to say is it is not mandatory that if you are configuring HSRP on one interface you have to configure on second interface but if you want redundancy for your second interface also you can have HSRP also for seocnd interface having another router interface working as hsrp peer for second interface. Appreciate if you rate the post Regards, Ankur ... View more

Hi Devang, It all depends on network setup and requirement but yes there is no problem to have preempt on both the routers. You can have it configured on both the routers even if you do not need in your situation. Regards, Ankur ... View more

Hi Jackie, You are on a wrong mode. You have to go to config mode first to go to interface config mode. So try this CSSWMAR51#config t CSSWMAR51(config)#interface fa0/24 CSSWMAR51(config-if)#switchport mode access CSSWMAR51(config-if)#switchport access vlan HTH, if yes please rate the post. Ankur ... View more

Hi Carl, If the complete router goes down then there is no use for tracking at that point as there will be no hellos going from active to standby router and standby router will come up as active. Only when the tracked interface goes down then there is a use for tracking command so that the HSRP copnfigured interface will come to know that tracked interface has gown down and will lower down the priority of the active router and standby will take the role of active router. I will appreciate if you start rating the post to all who helps you out. Ankur ... View more

Hi Shahid, 1) As I told RSTP is advance version of STP and is used for loop avoidance so you cannot compare with etherchannel. If you have 2 parallel ports connected between 2 2950 one will be blocked by STP but if you want both to be in forwarding state and give you more throughout you have to configure the 2 ports in one etherchannel and then both will be in fwding state so that is the reason it is said that etherchannel group is been added to the STP as a single switch or else if it is not a etherchannel one port will be blocked by STP. 2) PAGP or LACP is used for automatic creation of EtherChannels by exchanging packets between Ethernet interfaces but if you do not want any protocol to be running what you can do is manually configure etherchannel with mode as "ON" and this will stop use of PAGP and LACP and that is what is mentioned as Manually but you have to make sure that both the sides the etherchannel mode is "ON" 3) The etherchannel load balancing can be done source base or destination base ,ac address methids and which one to use depends on your network design and requirmeent of etherchanel. I will suggest you to understand first the 2 methods and then deploy one which most suits your network. To undersdtand the load balancing method just read this simple link http://www.cisco.com/univercd/cc/td/doc/product/lan/cat2950/12113ea1/2950scg/swethchl.htm#1020011 4) When any of the link in etherchanel fails the port does not get converged but the traffic gets converged because one of the port is already up and running fine so traffic will take few milliseconds to move through the other working port. In etherchanel as you know some traffic pass by one port and some by another and if one link fails all traffic will conferge and start going from single link which will not take much time. As you in STP ports is block and if fwding port goes down the port is converged but in etherchannel both the ports are fwding and if one port goes down traffic converges. So do not compare etherchannel with STO or RSTP at all. Also read this link about etherchannel for more undetstanding http://www.cisco.com/univercd/cc/td/doc/product/lan/cat2950/12113ea1/2950scg/swethchl.htm#wp1096986 HTH, if yes please rate the post. Ankur ... View more