Cisco Switching/Routing :: Configure 6500 To Respond To Messages As NTP Master
Feb 12, 2013
Setting up NTP. Currently the source for NTP within our network is our core 6500.Currently the NTP source for the 6500 are internet based NTP Servers. I would like to configure the 6500 to respond to NTP messages as the NTP Master. However will the 6500's source remain as the internet based NTP Servers?? In other words if the 6500is configured to be NTP Master, where would it get it's time from?
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Nov 22, 2011
I am confused on how acl's respond on normal cisco switch (eg.6500) when applied on respective vlans. this is my scenario:on a 6506, i have 2 main vlans in question: Vlan 100 ( vendor1 - 172.16.100.0/24 ) & Vlan 200 ( vendor2 - 172.16.200.0/24 ). the requirement is,
- vendor1 should be able to access/ping vendor2 end points
- vendor2 should not be able to access/ping vendor1 end points
Now, if i ping from a host 172.16.100.11 in vlan 100 to another host 172.16.200.21 in vlan 200, will i be able to get a successful response ?
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Dec 26, 2012
I am getting the below messages on my Cisco 6500 series switches every 1min. The IOS version is 12.2(33)SXI6 & with SUP32-GE-3B
%ILPOWER-7-DETECT: Interface Fa1/1: Power Device detected: Cisco PD
%ILPOWER-7-DETECT: Interface Fa1/1: Power Device detected: Cisco PD
%ILPOWER-7-DETECT: Interface Fa1/1: Power Device detected: Cisco PD
These messages are I am recieving on few ports only not on all port having IP Phone connected. I tried changing the phone to some other model but that also did not resolved my problem. Also I tried powering on the phone using power adapter but the issue still persist.
Client are not facing any issues due to this error, but still I would like know what can be the issue which is generating these logs.
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Jan 3, 2012
I have a Cisco 6500 router at my POP site and I have a Cisco 2811 at the tail site. I have to bond 3 city to city T1s to make a 4.5Mg pipe between the 2 ends. How do I configure the routers to make this happen? This is a configuration example for a single T1:
POP end on 6500:
interface Serial1/0/1:0
ip address 10.125.1.1 255.255.255.248
Tail site on 2811:
interface Serial0/2/0
ip address 10.125.1.6 255.255.255.248
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Dec 7, 2011
Is it possible to configure the switchports on a 6500 linecard before it has been inserted?
So for example, I have a 6509 with slot 9 free. I'm going to install a 48 port line card. Is it possible to configure those 48 ports before the card is inserted?
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Jan 29, 2012
We have Nexus 7k running as my core with a 6500 manageing my server farm and IP services servers (call manager, IPTV ...)My edge switch are 4500s. We currently have RIP2 running between and the switchs and each 4500 is managing its own VLANs.The IPTV uses IGMP snooping and multicasting to broadcast the video feed. The problem that came up is that the we cannot configure a gatewar for the setup boxs for the IPTV system. They will only work on a single VLAN and they are spread all over the network.Can we configure only this VLAN to be propagated over our RIP network???
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Jun 9, 2013
I'm trying to configure a egress netflow in a 6500 (VSS) with VS-S720-10G supervisor. I foud some old posts and understood that netflow wasn't supported on 6500 but i found a new document and it seems that netflow is supported in Supervisor Engine 2T:[URL] Does the netflow still not supported in VS-S720-10G? It's weird because the command is supported:
#sh run int vlan 4
Building configuration...
Current configuration : 353 bytes
!
interface Vlan4
ip address X.X.X.X 255.255.0.0
[cod]....
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Feb 26, 2012
I have a switch layer 6500 series connected to a firewall, the port configuration between them is layer 2, in another words I do not configure an IP address in the Cisco switch port to conected it in the firewall, but when a apply a policy on firewall it lose communication with others vlans, just the vlan that is connected between the switch and firewall works, attachment the design. I think that is necessary to configure the connection between the firewall and switch as layer 3 ( a port with IP address in the switch), but I would like to know why? The switch is configured with about 10 vlan and it is a inter vlan routing, a default route is configured in the switch where the gateway is the firewall.
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Jul 30, 2012
I am experiecing issues with HSRP.I have two 7200 core routers connected via one portchannel layer 2 and i set up the HSRP.The switch 01 is the master and 02 is the bkp.the problem is, the bkp router can´t see the master and there are a lot of loggs with active-speak and can´t see the master. the configuration are ok, i just check and recheck but there are no mistakes. [code] the configurations are ok, but the router can´t see each other, just in the vlan 500 the other vlans are ok.
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Aug 2, 2012
Cisco 851 router Apple Ipad 3 using IPSEC setp get this message The VPN server did not respond. I have tried Anyconnect that gives me Cannot verify server identity anyconnect can't verify the identity of ios-self-signed-certificate-1164042433 would you like to continue anyway? hit continue and it just goes off. I was asking if If get an ASA 5505 to replace my 851 it would work in my environment.
I have 15 computers accessing the web thru the 851. I host a web site on one of my servers. I have a static ip address. I also host exchange server and have remote web access to my exchange as well as remote outlook users. I can VPN thru the 851 using the cisco client on Windows 7 and vista and even xp. Would like to use the native windows client and get my iphones and ipads working. Can the ASA5505 support the above? Was also looking at the cisco 1841 how about that one?
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Aug 22, 2009
Don't know if this is right section of NetPro forum to bring up my problem. I have 871 router configured as NTP master. It works as a gateway for a small windows network with a domain controller. I want DC to pull the time from the router and configured the router as follows:
Code...
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Jan 30, 2013
I would like to know if it's possible to change a master in a 3750 stack without rebooting it?I searched in Cisco documentation, in the forum, and I googled it but I didn't find anything.
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Apr 18, 2012
We have a stack of a 3750E with a 3750X, when we turn off the master, a disconnection occurs for around one minute while only one request timeout is seen when the slave is turned off. Is this normal? Details: in other words, when the slave switch is elected as the new master all the port-channels and some physical ports become in 'down' state before reobtaining the up state again, this results in a one minute outage. The question is: is it normal to have a layer2 control traffic interruption when the master fails and re-election occurs and if yes, what is the normal downtime in seconds. the layer2 control information such as port-channels LACP protocol are not synchronised to all slave switches by the master?
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Jun 13, 2012
About an hour ago I had the master switch on one of my 3750x (WS-C3750X-48PF-S) stacks crash. The only two items we've found that could have caused this issue are the roughly 1.3 million big buffer misses and several of the following in the syslog
SLT:WARN:No exporter configured for smartlog! I do not have smartlogging turned on, nor is there a netflow exporter configured
sh logging smartlogsmartlog is disabledsmartlog exporter:smartlog pkt length: 64 Total pkts processed: 0Total DHCP Snooping pkts processed: 0Total DAI pkts processed: 0Total IPSG pkts processed: 0Total ACL pkts processed: 0
I did not see any traffic spikes prior to the crash.
This stack has been stable since it's last IOS upgrade from 12.2(58)SE1 to 12.2(58)SE2 back in October 2011 so this has me a little worried.
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Feb 27, 2013
I have two like switches in a stack (WS-C3750G-48PS 15.0(1)SE2 C3750-IPBASEK9-M). Switch#1 is the master and is the one that needs to be replaced. Can I force Switch #2 to be the master, then power down switch#1, remove switch#1, insert the replacement, and then power on the newly added switch without shutting down or rebooting switch#2?
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Oct 18, 2012
We have 2 3750 24 port fiber switches in a stack and we would like to change the member to become the master. Both are running the same IOS and they are alive on the network. I read that you can change the who becomes the master by setting the priority number higher on the member, which we did. However this requires a reboot of the member to take effect. Is there a way to force this without having to reboot? One other note, both switches in stack have a single gig connection that goes to the core (6500). One gig link is blocked due to spanning-tree and this is on the member that we want to become the master.
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Jun 4, 2012
I have a stack of 2960S (c2960s-universalk9-mz.122-55.SE2.bin) and the master has failed (used to have a priority of 14). The second switch has become master (priority 1) as can be seen below: [code]
If I connect a new blank 2960S (same IOS) through the stack ports, will the master sync its config to the new one without causing problems?As I understand the new blank switch will also have a priority of 1 and will by default be numbered as 1. So if the config is correctly synced and I later on want to make switch 1 the master, I need to set the priority: [code]
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Jan 29, 2012
How can I measure a respond time from a switchport to another? What I intend to do is to measure packets transmission from a server. I have a Cisco 3750G in stack, and the server is connecting to it with a 1GE NIC. How do I measure from Cisco prospective? Any tools available from Cisco to measure such respond time? I have a PRTG on bandwidth management on this particular server switchport and it is around 45-70Mbps, which is less than 10% of 1GE interface.
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Apr 10, 2013
I'm trying to do a Master reset on my Catalyst Express 500 (WS-CE500-24TT v01) and I'm having troubles with this. url...I do everything as it says, but when I plug the cable and I pull up the Web browser nothings appear, just the message that I don't have a Internet connection. The LED port on switch don't stop blinking as LED setup either. Is there another way to do the master reset?
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Jul 18, 2012
I have 2 x 3750 stacked, the port number of the master switch is gigabitEthernet2/0/1, slave as gigabigEtherent1/0/1.
Can I change the port numbering so that the master switch gets GigabitEthernet1/0/x?
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Dec 21, 2011
how can we upgrade 6500 non modular ios to normal 6500 ios?
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Feb 11, 2012
Is there a way to get more messages out of a 2950 set to syslog? I've turned every logging option I can find to DEBUG, but all I get in my syslog are LinkUp/Down messages and "Configured from console by console". I'd love to see more information such as configuration changes, or even someone attempting to set up DTP on a switchport set to access mode.
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Mar 27, 2012
I've got a 48-port 3750 running 12.2(46)SE and I am seeing these messages in the logs. Has any seen this message before or what it means ?
Invalid packet (too large) length=22320
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Feb 28, 2012
I have a new redundant network with two cores C1 and C2 and five access switches A1 to A5. They are all Cisco SG300 switches. I have noticed there are too many STP messages emanating from one host which has a MAC address which cannot be traced on the network. In the redundant network, I made C1 the root bridge by giving it a priority of 4096 and C2 has been given a priority of 8192 so that it is the secondary root bridge in the network. I have left all other STP settings to default on the rest of the switches in the network.
The problem is that one host is advertising a RST root bridge all the time. Now it has a mac address which is different from the mac address of the root bridge itself and i cannot trace this mac address on the network. Look at the snapshot of Wireshark output in the attach.The source MAC address which is the host advertising all the time is 1c:df:0f:34:db and the root bridge is 1c:df:0f:bb:34:c4.
Why would the root bridge be resetted all the time?I've also noticed that one port in a LAG configuration on one of the access switches is flapping up and down all the time.I tried to troubleshoot this problem. It is not the cable. It would be something else. What could cause this flapping of the port?Could it be related to STP?
On the other Core switch C2 I can see a LAG status switching between forwarding and blocking all the time. What could make the LAG status to flap from forwarding to blocking and back all the time like this?
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Dec 16, 2012
Is there a way to turn off 802.1x authentication messages to the console of a 3750 switch? The issue we have is that we like to monitor the terminal when remotely configuring our switches. However, every time a computer authenticates to the network we get messages and sometimes quite a few depending on the situation.
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Dec 26, 2010
I had these error messages on both my Cisco 2851 and on my Cisco Catalyst 6506.
On Cisco 2851:
%SYS-SP-3-CPUHOG: Task is running for (2000)msecs, more than (2000)msecs (4/4),process = SEA write CF process. [code]...
And on 6506:
Dec 27 15:20:55 MET: %SYS-SP-3-CPUHOG: Task is running for (2000)msecs, more than (2000)msecs (129/129),process = SEA write CF process.[ code]...
I have these IOS versions on my Cisco:
Cisco 2851: 15.0(1)M4
Cisco 6506: 12.2(33)SXI
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Jan 24, 2012
While working at a client site today, I was troubleshooting some ICMP connectivity for a network we have created.I turned on 'debug ip icmp" on the 3550 switch int he middle, and was inundated with the following debug output:
Jan 25 11:01:14.641: ICMP: dst (172.16.1.7) port unreachable rcv from 172.16.1.5
Jan 25 11:01:14.641: ICMP: dst (172.16.1.7) port unreachable rcv from 172.16.1.5
Jan 25 11:01:14.641: ICMP: dst (172.16.1.7) port unreachable rcv from 172.16.1.5
Jan 25 11:01:14.641: ICMP: dst (172.16.1.7) port unreachable rcv from 172.16.1.5
[code]....
This output fires several times a second, and based on how often it is firing, I am curious if it may be a culprit with respect to the fact that the client has indicated that they have some slow internet.Should the next step be to look at the workstation at 172.16.1.5?
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Jun 12, 2012
Is there any way to change the port that is used for syslog messages on a Cisco 9500 switch?By default this is set to UDP port 514.There doesn't seem to be a command to change the port.
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Sep 30, 2012
We use C2950G switches with IOS 12.1(22)EA12 . Switches are set up to send logs to a server (informationnal level). On this server, we receive many of logs from those switches, but none about interfaces errors (even if interfaces statistics show interfaces errors). On C3548 switches it's work fine.How should I be sure the set up of switches is correct ? Why do I never receive messages as %LINK-4-ERROR:[char] is experiencing errors ?
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Aug 15, 2011
I m getting below error messages in show logs -
Aug 12 15:30:57.127 IST: %ENVIRONMENT-3-RPS_FAILED: Faulty internal power supply detected
Aug 12 15:31:02.175 IST: %ENVIRONMENT-3-RPS_FAILED: Faulty internal power supply detected
Aug 12 15:31:08.219 IST: %ENVIRONMENT-3-RPS_FAILED: Faulty internal power supply detected
Aug 12 15:31:10.239 IST: %ENVIRONMENT-3-RPS_FAILED: Faulty internal power supply detected
there is no error messages related to PSU in "show env all " log .
here is show version -
------------------ show version ------------------
Cisco Internetwork Operating System Software
IOS (tm) C2950 Software (C2950-I6K2L2Q4-M), Version 12.1(22)EA13, RELEASE SOFTWARE (fc2)
Technical Support: [URL]
Copyright (c) 1986-2009 by cisco Systems, Inc.
[Code] ....
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May 9, 2012
I have a situation in which I want to log a specific message (informational - 6 level), but don't want to enable informational logging and get all the messages that come with it. Is there a feature in IOS, 3560 12.2(25r)SEE4, similar to the 'logging lists' feature on the ASA that allows you to specify logs that you want to capture without having to change your logging level? I didn't want to have to write an EEM applet for this, but if that's the only way, I'd consider it.
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Jul 2, 2012
Query is, Can i send my syslog messages to SNMP sever? if so, what command needs to be enabled on nexus 7k?
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Dec 9, 2012
We have recently upgraded oor LAN and we are using couple of Nexus5548UP switches in the core with 2960 stacks as access switches. Each access switches stack is connnected to both core switches with link being port-chanels and VPCs. All is working fine, but our SolarWinds management platform (NPM) is being flooded with "Physical Address changed" events. Here is an example of messages:
NSW_Core_2 - Ethernet1/7 Physical Address changed from 000000003811 to 73616D653811
NSW_Core_2 - Ethernet1/7 Physical Address changed from 200B82B43811 to 000000003811
For each interface I have messages like these repeating.I am not sure what those messages means or if there is actually anything wrong. Performance of the network is good, there are no errors on any interfaces and I do not see anything related in the switch loggs.
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