hi, my question: why we have to let a unicast address join multicast address and then calculate DMAC address. Why the DMAC is not calculated directly from the unicast address? for example, in normal situation when we have IPv6 unicast address like 2...
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Forum Posts
Hi Cisco Experts, I have an issue that in Cisco 3750 Switch, that Voice VLAN 800 for IP Phones is working on interface Fastethernet port but not working on gigabitethernet port(no lights on IP Phones via POE). Only the Data VLAN is working on Gigabit...
Hi Guys, i have created topology where i want to Track 8.8.8.8 IP. if first path with deafult route goes down then it should take another deafult route which is having higher AD. Please find attached file and below config. R2:ip sla 1tcp-connect 8.8....
Scenario:Imagine there are 3 switches s0 s1 s2. S0 is connected to s1 and s1 connected to s2. Pc0 is connected to s0 and Pc2 connected to s2. Both pc0 and Pc2 are in vlan 2. Trunk links between switches. Does pc0 and Pc2 communicates????
Hi, I'm looking for an explenation.I have disabled spanning-tree on my stacked catalyst 3750's. switch#sh spanning-tree No spanning tree instance exists. However the spanning tree process still remains at 30+%.. some moments the switch goes to 80%+...
Resolved! SG300 VLANs for IP Phones?
I have a site with Polycom VVX IP phones. The users' computers patch into the back of the phones for data connectivity. Currently I have all endpoints as part of the same LAN segment. But we have a fair amount of UDP congestion, so I need to partitio...
Resolved! process usage
There are high process usage (>90%) seen on cisco 3650 switches , these are a stack of 5 switches.fed shows high count in the 40%'s. is that considered normal & expected? we have checked some cisco bugs , but the version is not applicable to us. 412...
Hi all, we have 8 defective Routers 891f. Our Customer tried to upgrade the Routers IOS via remote connection. While sending the new IOS to the Router the connection was interrupted. Unfortunately the Password Recovery Function is disabled so we do...
Hi Team, Need your expertise. Is it possible to have communication between differnt PC?I have configured 2 SVI on ESW1 and ESW2.vlan 10= ip 10.1.1.100vlan 20= ip 10.1.1.200I am to ping from PC1 to PC4 but not with any other PC. How is this possib...
Hi,I am trying to connect a 9200 switch stack to our existing 3850 core switch via fiber. I have no idea why, but I am unable to get this to work; I'm getting no blinking lights on either end of the connection.I am using a 1GB GLC-SX-MMD at both ends...
Resolved! Ether-Channel LAN Speed
Hi Hope you all doing great, i am using two switches one is 3560 and second one is 2950 for ether-channel i have tested all links by unplugging them ether-channel is working fine but the problem is its not making impact on LAN speed like both switche...
Hi,I have four SG350X Switch and I plan to stack them.I have seen that I can operate them under a Chain or Ring topology: what is the main advantage of each topology?He seems that, compared to ring, chain topology is not considered to be very robust,...
I am running a transparency test for NCS 520. Software release 16.11.01, licence metroaccess. UNI port gi 0/0/3 has an Ethernet service with default encapsulation and NNI port gi-0/0/2 pushes a VLAN tag to frames received from the UNI port. I have us...
Hi, I've got an 8 port Cisco 2940-8TF-S switch, which I'm trying to add QoS VLAN settings to one particular port. The lines of config I'm trying to add are below: srr-queue bandwidth share 10 10 60 20srr-queue bandwidth shape 10 0 0 0priority-queue o...
Resolved! Unable to access a switch after reboot
The problem occurs after rebooting the switch. The switch comes back up, but I am not able to ping the switch or telnet to the switch.When connecting directly into the console of the switch, the switch is not able to ping out. Shutting down the vlan ...
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