Existing setup: redundant (HSRP) 6506 setup (running for more than a year like this), with: OS (tm) MSFC2 Software (C6MSFC2-PSV-M), Version 12.1(11b)E, EARLY DEPLOYMENT RELEASE SOFTWARE (fc1) ... cisco Cat6k-MSFC2 (R7000) processor with 114688K/16384K bytes of memory. ... R7000 CPU at 300Mhz, Implementation 39, Rev 3.3, 256KB L2, 1024KB L3 Cache Last reset from power-on X.25 software, Version 3.0.0. Bridging software.
9 Virtual Ethernet/IEEE 802.3 interface(s) 509K bytes of non-volatile configuration memory.32768K bytes of Flash internal SIMM (Sector size 512K). Configuration register is 0x102 ...
... where the short time to live is caused by our attempts to reset each one of the two HSRP participants, in blind attempts to clear up the following problem:
Since yesterday, all VLANs, except for VLAN1, started experiencing HUGE TCP retransmissions problems at all connected stations. Various dump files sent to Cisco, to no avail (no response from Cisco, as to what the problems could be).
No cabling (physical) work, no VLANs added, no modifications having been made to the environment since when it used to work just fine, and now, when - because of retransmissions - the whole network (as "seen" from client workstations) is crawling to almost a halt.
If some of the inter-vlan routing is moved (experimentally) to a 3750, the retransmissions for those parts/VLANs go away, and the clients experience the "old, good" network performance. But this is - obviously - not a permanent solution. This only comes to prove that cabling could not be a problem, as it becomes the same physical infrastructure under the 3750 "control"
Forcing the inter-VLAN routing from the active, to the passive 6506, and back, does not improve anything, under either of the conditions.
The log files show absolutely nothing significant.
Production is heavily affected - any suggestions would be appreciated. Any other info you may think of being needed?!?
TIA, Papi