5 votes
Accepted

What is the Cisco IOS 12 "Ctrl +C" Key sequence to Break an operation

Ctrl + Shift + 6 ? I believe this is it. Edit: Ron is correct, I do think you need to press X afterwards.
Duffman's user avatar
  • 173
3 votes
Accepted

Configure SSH cipher on Cisco IOS 12.2(55)SE7

As stated by @Teun Vink in comment, no way to do so but the given workaround using ssh -oHostKeyAlgorithms=+ssh-dss -oKexAlgorithms=+diffie-hellman-group1-sha1 $HOST do the trick.
JFL's user avatar
  • 19.7k
3 votes

IOS upgrade - pair of WS-C6509-E

There's bug with some line cards on this platform which leads to card crash when reboot occurs after long uptime. If this happens, the card is subject to RMA. Cisco can determine potentially risky ...
ar_'s user avatar
  • 1,133
3 votes
Accepted

Moving from 12.x IOS to 15.x IOS - Cisco 3750G

Converting comment to an answer. You can upgrade from version 12.2(35)SE5 directly to the newest IOS version for the switch 3750 series found on Cisco download center. The upgrade process will ...
Cow's user avatar
  • 1,732
3 votes

Reserve an IP for client on Cisco DHCP server

You have to create another pool with client-identifier and your Client ID, which usually defaults to MAC prepended with 01 (Ethernet client), or hardware-address and your MAC like this: ip dhcp pool ...
Andriy Berestovskyy's user avatar
2 votes
Accepted

using Cisco WIC-4ESW 4PORT ETHERNET WIC Card (L2 switching card) on a 1700 Cisco router, where the router stores the MAC address of connected devices?

The WIC-4ESW is a small, very dumb switch -- looks like it's entirely an FPGA and not an off-the-shelf switch SoC. One thing to note, the WIC interface is about 8Mbps, so layer-3 through put will be ...
Ricky's user avatar
  • 32.2k
2 votes

using Cisco WIC-4ESW 4PORT ETHERNET WIC Card (L2 switching card) on a 1700 Cisco router, where the router stores the MAC address of connected devices?

Does the router use the ARP table for the L2 switching (instead of MAC table as usually done on "regular" switch)? No. The Etherswitch card is a layer 2 switch, and has most, if not all ...
Ron Trunk's user avatar
  • 67.5k
1 vote
Accepted

Cisco IOS Switch: Why is "no spaning-tree vlan XXX" automatically inserted on vlan creation?

Cisco switches do this automatically for new VLANs when you have exceeded the platform's maximum spanning-tree instance limit. With Cisco PVST+, the switch will run one spanning-tree instance on each ...
YLearn's user avatar
  • 27.3k
1 vote

Cisco IOS Switch: Why is "no spaning-tree vlan XXX" automatically inserted on vlan creation?

In my opinion, it could be a IOS bug - a "comestic" issue. There is a similar issue reported though not on C3560X but on Nexus model at here. You can issue show spanning-tree vlan 218 and other vlans ...
Hung Tran's user avatar
  • 3,754
1 vote
Accepted

Reserve an IP for client on Cisco DHCP server

There is a solution to avoid the multiple manual bindings. Here is a link to Cisco documentation concerning DHCP origin and database files: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/...
SeanP's user avatar
  • 26
1 vote
Accepted

IOS upgrade - pair of WS-C6509-E

As has already been mentioned, there are issues with line cards that were manufacture between a certain date period that will fail to boot once they have been on for a certain period of time already ...
Baldrick's user avatar
  • 5,300
1 vote
Accepted

Cisco 9971 connected to Cisco 3550

Probably an inline power issue. Phone Specs says IEEE Power over Ethernet 802.3af and 802.3at supported, class 4. The 9971 is compatible with both class 3 and class 4 IEEE PoE switch blades ...
Ronnie Royston's user avatar
1 vote

Syslog severity level to 5 + ACL BLOCKED log

Write an EEM script that looks for your syslog message at level 6 and in response emits a syslog message at log 5 or better. Note: I don't know if this works on your device/IOS version. The ...
mere3ortal's user avatar
  • 2,416
1 vote

Syslog severity level to 5 + ACL BLOCKED log

Cisco IOS Configuration Fundamentals Configuration Guide, Release 12.2 Troubleshooting, Fault Management, and Logging You just finish your standard ACL statement with the log keyword. The level of ...
Ronnie Royston's user avatar
1 vote

Syslog severity level to 5 + ACL BLOCKED log

The logging discriminator might be the feature you are looking for here. http://www.cisco.com/c/en/us/td/docs/ios/12_4t/12_4t11/htnmsylg.html#wp1056391 The format of such a discriminator is as ...
surya's user avatar
  • 400
1 vote

qos for Cisco VPN

Cisco IOS Quality of Service Solutions Configuration Guide, Release 12.2 GTS Enabled on the Interface Example This example shows the configuration of two traffic-shaped interfaces on a router. ...
Ronnie Royston's user avatar
1 vote
Accepted

Cisco IOS: ACL on local interface

Try applying policy-based routing (PBR) to local traffic: ip access-list extended DROP permit icmp host 10.0.2.1 10.0.2.0 0.0.0.3 route-map LOCAL_DROP permit 10 match ip address DROP set ...
Everton's user avatar
  • 1,636
1 vote

How to find the port a device is connected to, based on IP, on a Cisco Catalyst switch

Just telnet yourself into the switch, then unplug the device, then replug it. The switch will write a message which port was down and then up. I hope this helps.
Daniel's user avatar
  • 11
1 vote

How to find the port a device is connected to, based on IP, on a Cisco Catalyst switch

Quickly? Telnet or SSH into the Cisco switch. Type terminal monitor; press enter. Unplug the cable or shut NIC via the OS from the endpoint in question 00:00:47: %LINK-3-UPDOWN: Interface ...
Ronnie Royston's user avatar

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