12-23-2009 03:49 AM - edited 03-06-2019 09:03 AM
Hi frnds,
I am saravanan from Bangalore. In one of my customer has 4503 switch connected with 20 2950 switch. I want to enable the trunking protocol in between the both L3 and L2 switch dedicately. In 2950 Encapsulation dot1q and ISL options are not there, how can be to enable the trunking.
Then another issue, when i enable VTP mode from Transparen to server mode, how much time it will take. After enable the server mode, that L3 switch is hanging (there is no ping ), but when show vtp status and counters. It shows the number of advertisements and revision numbers also.
but it is hanging more than 2 minutes, so rollback in to old mode (transparent). Please tell me how much time it will take.
Thanks in advance
Solved! Go to Solution.
12-23-2009 01:12 PM
Hello Saravanan,
Please try to go over the following steps:
I suppose that this sequence of steps can help you to deploy the VTP successfully in your network but please be careful to follow the individual steps very closely and if there are any unclear or unexpected things, please come back and ask again.
Best regards,
Peter
12-26-2009 06:44 AM
That great Saravanan that suggestions has helped you,It will be helpful if you can mark this thread as answered and rate the post which has helped you.
Regards
Ganesh.H
12-23-2009 04:04 AM
Hello Saravanan,
On 2950 switches, the only supported trunking protocol is the IEEE 802.1Q. Therefore, the only command necessary to activate trunking on a port of the 2950 switch is:
interface FastEthernet 0/1
switchport mode trunk
The corresponding port on the 4503 switch should be configured with:
interface FastEthernet 0/1
switchport trunk encapsulation dot1q
switchport mode trunk
Regarding the VTP protocol, I am not quite sure what you are asking about. A change from VTP Transparent to Server mode takes place immediately after you change the mode (and if you are using the VLAN database mode instead of usual global configuration, you need to issue the exit command for changes to take effect). However, the VTP propagates only through trunk links - its datagrams are not sent on access ports or on routed ports. Also, each switch has to be converted from VTP Transparent to VTP Server/Client mode individually - this setting will not propagate through VTP.
Perhaps you have the VTP Pruning activated. If the VTP Pruning is activated but the neighboring switches have not joined your VTP domain successfully (they are VTP Transparent, or their VTP domain name is different, the VTP password is mismatched, the trunking is not working properly between the 4503 and the neighboring switches), the VLANs will be pruned off the existing trunks, thereby possibly leading to the SVI interfaces going down. Try deactivating the VTP Pruning.
In any case, deploying a VTP in a customer's network needs more planning than just turning it on. I recommend caution and more testing before rolling out.
Best regards,
Peter
12-23-2009 04:16 AM
Thanks mr. peter paluch,
I will the neighbor switch vtp status, domain and mode also.
actually
4503 ------> 2950----> i am in here,
I changed the mode from VTP transparent to vtp server in 4503, then communication is dropped in my place, respectively all other switches (L2) which are connected to 4503 also not communicated. That is the issue.
Next thing is, After enable the trunk mode in both side, cisco 2950 is not accept the other vlan except the switch vlan. I enable Trunk allowed vlan all
also. even though the same thing is going on.
So what is the problem is that issue.
12-23-2009 01:02 PM
You will probably have to post the relevant configs on both the 4500 and the downstream access switch . Here is a link to the complete config guide for the 4500 .
http://www.cisco.com/en/US/docs/switches/lan/catalyst4500/12.2/53SG/configuration/vlans.html
12-23-2009 01:12 PM
Hello Saravanan,
Please try to go over the following steps:
I suppose that this sequence of steps can help you to deploy the VTP successfully in your network but please be careful to follow the individual steps very closely and if there are any unclear or unexpected things, please come back and ask again.
Best regards,
Peter
12-24-2009 01:01 AM
Very very thanks sir,
i will follow the procedure to do the vtp process, when i have downtime of the switch.
12-25-2009 01:10 AM
Dear mr. peter,
In catalayst 500 series switches, vtp modes are not there, i have a doubt about the vtp modes.
Is it allow the vtp modes automatically or is it not available.
please tell ya.
12-25-2009 01:30 AM
Hi ,
In Cat OS you need to try with set commands,check out the below commands in cat 500 series switch hope this helps out your query !!
set vtp domain domain-name
set vtp mode transparent
set vtp mode off
Regards
Ganesh.H
12-25-2009 02:11 AM
Mr. Ganesh Sir,
In Catalyst 500 series switches dont have telnet option, only web browsing only available.
In the web browsing VTP Option is not there. So it will pass the vtp status or not.
CLI mode is not there in c500 switches.
12-25-2009 04:42 AM
Hi ,
As suggested by Peter cat express 500 works in transperent mode -
check out the below link hope this helps out your query !!
http://www.cisco.com/en/US/products/ps6545/products_configuration_example09186a00806da6c9.shtml
Regards
Ganesh.H
12-25-2009 03:51 AM
Hi Ganesh,
Thanks for insight how to configure VTP setting on CatOS-based switch but Saravanan was asking about Express 500 series switches, not about Catalyst 5000.
Best regards,
Peter
12-25-2009 04:40 AM
Thanx peter for the clarification !!
Regards
Ganesh.H
12-25-2009 03:51 AM
Hello Saravanan,
On Cisco Catalyst Express 500 Series switches, there is currently no support for VTP protocol. As a matter of of fact, these switches relay the VTP messages transparently, thereby behaving as VTP Transparent switches. You may visit the following URL for additional information:
On Catalyst Express 500 Series switches, you will have to create all necessary VLANs manually.
Best regards,
Peter
12-26-2009 12:02 AM
Thanks Mr. Ganesh & Peter,
I want to send logging information to syslog server, how can i enable in Express 500 series,
Please suggest any syslog server for freeware and full. Currently i am using Kiwi syslog server free version.
12-26-2009 12:57 AM
Hello Saravanan,
Your question regarding the Syslog server is no longer pertaining to the original thread topic (the VTP protocol). In future, please, create a new thread so that other people looking for similar issue can find it easily.
Regarding the Syslog server implementation, I personally recommend running Linux and using the syslog-ng. It is very capable and it allows you to sort your logging messages according to various criteria into logfiles. I haven't been using any Windows version of Syslog software and frankly, I do not know any. Luckily, I never needed it
Best regards,
Peter
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