Switching

Hi ... We have some sites connected through Cisco ASR1001-X routers.  I've attached the schema and "show inventory" of two routers to show the modules and models. We configured "pseudowire" Ethernet over MPLS to extend some VLANs.  This configuration...

Hi All, A question on design.  I'm looking for a best practice/design on the subject.  I've worked on an NDS that specified 10% of port density be reserved for spare use.  By that math, for a 24 port switch that would leave me with 2 or 3 spare port...

Hi all, does the QSFP-40G-SR-S modul support breakout into 4 x 10Gig-mode on Nexus 5696Q? We should connect FEX-models N2248! Thx

Hello, I have been unable to find a succinct answer to this question so I thought I would ask on the official Cisco support forums. If two switches are trunked together with 802.1Q and the native VLAN is tagged on one side with "(config)#vlan dot1q...

I have a strange issue.  I have 2 new 6504E running 15.1(2)SY6 that I have configured with our default baseline and am unable to ssh into either of them from a desktop client.  They work with our solarwinds box and ssh from another switch but not fro...

I have switch that yesterday was down. After few hour i was able to connect it, and when I check the syslog messeges i didn't see anything about this problem. I checked the syslog on the switch that connected to it, and also there were not syslog mes...

Hi all,  I have this setup (the first picture) and i want to introduce redundancy (I am a just starting to gain experience on networking) because whenever one of the stack switches fails, failure of some services are experienced. So in order for it n...

Hello, Im am currently testing the new features of IOS 150-2.SE5 with SmartInstall Is there a way to bring the IP SSH Key in the backup-config that after restoring the SSH Key is in the Switch ? I've seen a "kron" in a forum but it was not working...

I have 2 Cisco 881 I have created the a site to site vpn connection between them. the CCP interface indicates that the vpn is up and active, but I can't ping anything on the other network, even the routers can't ping each other. I think the issue mi...

Hello, I am having trouble understanding the direction in which the load-balancing algorithm is applied in a switching scenario. Consider two switches S1 and S2 connect together via a port-channel. S1 is on the left and S2 is on the right. On S1 if...

Configured two 5548 Nexus switches with VPC and a 4506 as an access switch with a port channel trunk uplink. All looks OK but when I fail one of the links from the 4506 connectivity is lost for 30 - 45 seconds. Almost like spanning tree re-converging...

Hi All If designing a moderately sized datacentre with say 15-20 racks, using VM / NETAPP / WINDOWS servers etc what would people go for these days? currently we have 6509e switches with 3750x stacks at the top of each rack, of which we have been hav...