Good Day
Our company has a problem. Would you be so kind to help us.
Here is a short description of our problem
Our clients have a network with the topology that described below. Two commutators 2900XL are connected by FEC and it is used 2/1-2/4(100FX). Commutators have IP-10.1.1.2 and IP-10.1.1.3 correspondingly. To each switchs (2900XL) is connected Cat2950s using by trunk connection (1/1-1/4100FX).The switches 2950 (10.1.1.4, 10.1.1.5, 10.1.1.6) are connected to the first switch with ip 10.1.1.2(2900XL) and the switches 2950(10.1.1.7,10.1.1.8,10.1.1.9) are connected to the second switch with ip 10.1.1.3(2900XL). . All commutators 2950 have 2950 IOS- 12.1(19)EA1a, and all commutators 2900XL have IOS-12.0(5)WC9. The switch 2900XL(10.1.1.2) are connected to the 2621 to achieve routing between VLANs.
There are four problems:
1). Ping from any 2950(10.1.1.4(5,6)) was successful and passed to the 2900XL(10.1.1.2). Ping command from 2950(10.1.1.4(5,6)) did not passed to the other 2950(10.1.1.4(5,6)) and 2900XL(10.1.1.3) which are connected to the 2900XL(10.1.1.2), till then 2900XL has not made Ping by itself to the switch. In other words commutators can make Ping command through 2900XL. After 3 or 5 minutes situation comes back.
2). All uplinks 2950XL have ignored frames. Broadcasting frames about 70-80 %.
3). At one of the 2950(10.1.1.7) big,very big , large and huge buffers have failures
4). On the both 2900XL at the loading procces have appeared mistake “LINK-4-ERROR Fast1/1 is experiencing errors”.. When we unplug this interface and make a reload we have the same problem on the next interface.
There are no redundant links in configuration. Speed and duplex on the trunk connection at the both side are tunned up in a similar manner. FEC is tunned up correctly. The type of topology is a star. The protocol CDP is switched off.
Please give your advise what is the problem? If this is the mistake of the equipment then what switch is wrong?
Whait to hear from you soon.
Thank you in advance.
