How to configure a primary and secondary core switches in 6500 series how to link with distributor switches

[azad4frnd1]

Hi Guys,

i am terrible confusing with reference to the above subject

also what is aggregating links and PAgP,LCAP why we are using it

what is SUP engine

i hope i will have answer for it 

Regards,

Azad

[InayathUlla Sharieff · Accepted solution]

Azad,

Let me try to answer:-

Core switch: 6500

Primary and Secondary:- This means tht when you have 2 core switches connected between each other you can configure one to be primary and other to be in secondary.(i.e when one goes down the other can take over the active role.)

If both are 6500 there is new concept of VSS which means you can bundled 2 switches but it will act as 1 for the downstream switches which is very good option.

Aggregating links:-

6500=====two link===6500

this means you are connecting two or more link between each other and want to utilize both the link simultaneously rather than wasting one link in STP blk state you use etherchannel. There are two protocols used by this which are known as Pagp & LACP. PAGP is cisco proprietary and lacp is open standard. (If you dont use etherchannel only one link is active at any given point of time and other link will be block which means you will be wasting that link).

What is sup engine:- Sup engine is heart of the chasis. If you dont have sup engine the box will be like dump nothing can be done. Sup engine will take care of booting the box, communicating with the linecards and do all the jobs for you.(its kind of heart/brian for the chasis to put in simple words).

HTH

regards

Inayath

**********Please do not forget to rate the post if helpfull********

[azad4frnd1]

Thanks for your reply, i have one more doubt about VTP version ......

can you give a difference between VTP1,VTP2 and VTP3

[InayathUlla Sharieff]

VTP 1 VS VTP -2 (Vtp 2 has the following upgrade support on its head)

1.  Support for Token Ring Vlans.

2. Version 2 supports consistancy checks.  This means that when new information about the VTP domain is entered through the command line or some other method like SNMP, VTP version 2 will perform the consistancy check.  VTP version 2 will not check a VTP frame if is it received from another VTP peer or if the information is obtained from NVRAM.  The VTP peer will perfom a MD5 hash check on a VTP frame received from a VTP peer and if it's correct, it will accept the message.

3.  In VTP version 2, if a switch is in transparent mode, it will forward the message without checking version information.  A transparent switch using VTP version 1 will check the domain and version before if forwards the frame.

VTP V3:-

TP version 3 supports these features that are not supported in version 1 or version 2:

•Enhanced authentication—You can configure the authentication as hidden or secret. When hidden, the secret key from the password string is saved in the VLAN database file, but it does not appear in plain text in the configuration. Instead, the key associated with the password is saved in hexadecimal format in the running configuration. You must reenter the password if you enter a takeover command in the domain. When you enter the secret keyword, you can directly configure the password secret key.

•Support for extended range VLAN (VLANs 1006 to 4094) database propagation. VTP versions 1 and 2 propagate only VLANs 1 to 1005. If extended VLANs are configured, you cannot convert from VTP version 3 to version 1 or 2.

---

Note VTP pruning still applies only to VLANs 1 to 1005, and VLANs 1002 to 1005 are still reserved and cannot be modified.

---

•Private VLAN support.

•Support for any database in a domain. In addition to propagating VTP information, version 3 can propagate Multiple Spanning Tree (MST) protocol database information. A separate instance of the VTP protocol runs for each application that uses VTP.

•VTP primary server and VTP secondary servers. A VTP primary server updates the database information and sends updates that are honored by all devices in the system. A VTP secondary server can only back up the updated VTP configurations received from the primary server to its NVRAM.

By default, all devices come up as secondary servers. You can enter the vtp primary privileged EXEC command to specify a primary server. Primary server status is only needed for database updates when the administrator issues a takeover message in the domain. You can have a working VTP domain without any primary servers. Primary server status is lost if the device reloads or domain parameters change, even when a password is configured on the switch.

•The option to turn VTP on or off on a per-trunk (per-port) basis. You can enable or disable VTP per port by entering the [no] vtp interface configuration command. When you disable VTP on trunking ports, all VTP instances for that port are disabled. You cannot set VTP to off for the MST database and on for the VLAN database on the same port.

When you globally set VTP mode to off, it applies to all the trunking ports in the system. However, you can specify on or off on a per-VTP instance basis. For example, you can configure the switch as a VTP server for the VLAN database but with VTP off for the MST database.

More info can be found from the following link:-

http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3560/software/release/12-2_52_se/configuration/guide/3560scg/swvtp.html#wp1035121

HTH

Regards

Inayath

[jain.manish94]

please can you tell me meaning of these

Port                      InOctets             InUcastPkts              InMcastPkts     InBcastPkts
Gi1/0/24             35762286057         187163318               1397081                0

Port                    OutOctets           OutUcastPkts           OutMcastPkts   OutBcastPkts
Gi1/0/24             53277081548       185299168                  3373164             82422