I'd like to get some input regarding network infrastructure design, and L2/L3 boundary recommendations. Let's assume the customer has a collapsed core w/ X IDFs. The current deployment is Layer 2 everywhere, w/ all routing coming back to the core stack/chassis. (They're not currently IP voice/video, but we'd like to design a solution that will support this, and efficient inter-data/v/v routing for collaboration purposes.)  Each IDF/building will have Y endpoints. At which point do you recommend a Layer 3 (L3) boundary at each IDF vs. an all L2 solution?  Specifically, we could position a single L3 switch at each IDF (like a Cisco 3650), with 2960X L2 switches within the building, to 1) control b/m-cast traffic, and 2) to facilitate inter-VLAN routing (between data/voice/vid VLANs) for more efficient collaboration traffic. Without a L3 switch at each IDF, all this b/m-cast and routing traffic would go back to the core. I'm hoping/looking for design recommendations - case studies/best practices, whatever. Customer-facing, I need to present real numbers for a L3 IDF switch vs. pure L2 for whatever number of ports. (Again, keep in mind that we need to design the solution to comfortable support IP voice/video in the future.But also keep in mind 98% of the traffic goes back to 1 of 2 data centers.) Thanks, and reference docs/links are always appreciated. ... View more

Hello, I am breaking in some old but new to me 6509-E with Sup 720 modules. Everything seems perfect expect the last reload reason. I have forced switchovers and hw-module reset both Supervisors and always one of them will come up with a 'last reload reason: bus error at PC 0x42818CFC, address 0x0' Everything else seems great though. The switches do keep forwarding when I force a switchover so SSO is working. Also I ran intrusive diagnostics and everything passed. Is this something to worry about? Here is a snippet Router>en Router#sh ver Cisco IOS Software, s72033_rp Software (s72033_rp-ADVENTERPRISE_WAN-M), Version 12.2(33)SXJ10, RELEASE SOFTWARE (fc3) Technical Support: http://www.cisco.com/techsupport Copyright (c) 1986-2015 by Cisco Systems, Inc. Compiled Fri 14-Aug-15 08:58 by prod_rel_team ROM: System Bootstrap, Version 12.2(17r)SX5, RELEASE SOFTWARE (fc1)  Router uptime is 10 hours, 55 minutes Uptime for this control processor is 10 hours, 38 minutes Time since Router switched to active is 22 minutes System returned to ROM by Stateful Switchover at 04:44:23 UTC Thu Jan 7 2016 (SP by reload) System image file is "disk0:s72033-adventerprise_wan-mz.122-33.SXJ10.bin" Last reload reason: bus error at PC 0x42818CFC, address 0x0 cisco WS-C6509-E (R7000) processor (revision 1.4) with 458720K/65536K bytes of memory. Processor board ID SMC1130001V SR71000 CPU at 600Mhz, Implementation 0x504, Rev 1.2, 512KB L2 Cache Last reset from s/w reset 1 Virtual Ethernet interface 52 Gigabit Ethernet interfaces 1917K bytes of non-volatile configuration memory. 8192K bytes of packet buffer memory. 65536K bytes of Flash internal SIMM (Sector size 512K). Configuration register is 0x2102 Router#sh red Router#sh redundancy Redundant System Information : ------------------------------        Available system uptime = 10 hours, 55 minutes Switchovers system experienced = 2               Standby failures = 0         Last switchover reason = user forced                  Hardware Mode = Duplex     Configured Redundancy Mode = sso      Operating Redundancy Mode = sso               Maintenance Mode = Disabled                 Communications = Up Current Processor Information : -------------------------------                Active Location = slot 6         Current Software state = ACTIVE        Uptime in current state = 22 minutes                  Image Version = Cisco IOS Software, s72033_rp Software (s72033_rp-ADVENTERPRISE_WAN-M), Version 12.2(33)SXJ10, RELEASE SOFTWARE (fc3) Technical Support: http://www.cisco.com/techsupport Copyright (c) 1986-2015 by Cisco Systems, Inc. Compiled Fri 14-Aug-15 08:58 by prod_rel_team                           BOOT = disk0:s72033-adventerprise_wan-mz.122-33.SXJ10.bin,12;                    CONFIG_FILE =                        BOOTLDR =         Configuration register = 0x2102 Peer Processor Information : ----------------------------               Standby Location = slot 5         Current Software state = STANDBY HOT        Uptime in current state = 15 minutes                  Image Version = Cisco IOS Software, s72033_rp Software (s72033_rp-ADVENTERPRISE_WAN-M), Version 12.2(33)SXJ10, RELEASE SOFTWARE (fc3) Technical Support: http://www.cisco.com/techsupport Copyright (c) 1986-2015 by Cisco Systems, Inc. Compiled Fri 14-Aug-15 08:58 by prod_rel_team                           BOOT = disk0:s72033-adventerprise_wan-mz.122-33.SXJ10.bin,12;                    CONFIG_FILE =                        BOOTLDR =         Configuration register = 0x2102 Router# ... View more