Remember only the c series ios images get newer IOS images. In this way you will be able to perform different switching labs with GNS3 like Vlans, inter-vlan Router on stick , VTP vlan trunking protocol , different multi-layer functionality etc. This Image was tested with Gns3 1. DF stands for 'Deferred. These should not be installed on your router. When choosing a release, Cisco recommends a GD release when possible. Only choose an ED release if your hardware and software features leave you no other choice.
Before you install a new Cisco IOS Software image on your router, check if your router meets the memory requirements for that image. For this, issue the show version command on your router, and look for these lines:. The memory requirements take this into account, so you have to add both numbers to find the amount of DRAM available on your router from a memory requirement point of view.
The , , , and routers have separate DRAM and Packet memory, so you only need to look at the first number. The bottom line tells you how much Flash memory is available. Some of it might already be in use. In order to find out the amount of free Flash memory, issue a show flash command:. Variants of the show flash command can be used to inspect different specific Flash devices on the platform. Refer to the show flash command definition for information on how to use these variants. You need to satisfy both the DRAM and the Flash requirements to be able to use the software you choose.
You may also consider a reduced feature set or an older release, since they have less features, and therefore fewer requirements. You can use the Download Software area or the Release notes in order to find the memory requirements for a particular release.
You can perform a bug scrub in order to check bugs on a new release. Refer to the Bug Toolkit registered customers only. Caveats describe unexpected behavior in Cisco IOS software releases. Severity 1 caveats are the most serious caveats; severity 2 caveats are less serious.
Severity 3 caveats are moderate caveats, and only select severity 3 caveats are included in the caveats document. This section contains only open and resolved caveats for the current Cisco IOS maintenance release. Note If you have an account with Cisco. This results in the router sending packets to a non-existent destination MAC address. SPAN doesn't work after moving one port from multi span src ports. Disabling a source interface from a monitor session results in disabling the entire monitor session, not just the specified port.
If a particular source port is required to be removed form a SPAN session, stop the entire SPAN session and re-configure with only the required source ports. Port security failed when configuring secure MAC addresses on an irrelevant port. But if a packet with secure MAC address M1 ingresses port P1, then the switch treats it like a station movement and allows the packet to be switched.
Cisco Systems recommends that when station movement takes place, the MAC addresses associated with the port should be cleared in the switch's tables before moving them to another port. The command show mac count shows the wrong number of MAC addresses when compared to the count of addresses shown by the show mac command.
If you apply the same data link control DLC value on an interface and on its subinterface twice in a row, the router may reset. The tracebacks point to the fast-ethernet interface that is being used to connect the router to the IP phones or rather the IP phone simulator.
The command ip tacacs source-interface does not work properly. If configured to use loopback interface for tacacs packets, the router may still use the interface address. The problem is that the T1 controller doesn't appear in the configuration.
The FastEthernet is present. A call to a busy FXS port produces an incorrect release cause code. Calls may receive a "no route to destination" message and an incorrect clearing cause code instead of a user busy cause code when calls are placed to a Foreign Exchange Station FXS on a busy interface. Depending on the equipment that is used, the caller may receive a "number unobtainable" message or fast busy tones instead of a busy tone when this condition occurs.
Enter the shutdown interface configuration command followed by the no shutdown interface configuration command on the BRI interface. The problem is intermittant, and DSPs may hang indefinitely as rarely as only once every few weeks. The problem is likely to appear when T. SRST router with FXO ports typically has a connection plar opx to route an incoming call on the port to an extension in the router.
With this problem, the incoming call cannot be transferred. Any busyout monitor command configured under a voice-port on a NM-HDA will disappear from the running-configuration if the router is rebooted. Issue a copy startup-config running-config to re-assert the missing commands. Use a replacement card that is the same as the original card. This condition will not occur if a card that is the same as the original is used or if a differently configured card is placed in a different slot. Under rare circumstances, a Cisco router may reload because of a segmentation violation SegV when fax calls are present.
Ringback is not available for calls coming in from a PSTN. IP phones do not ringback on the network side. Alignment traceback when transfer and conference call. Tracebacks are observed during conference and at times, during regular calls. The tracebacks are on misaligned accesses to memory. They are subsequently corrected by the hardware but prints to console are annoying and can be viewed as serious potential issues.
Bad voice-quality during conference call. Conferencing a-law and u-law mixes doesn't work as some legs in ITS end up with a-law and some with u-law which gives bad voice quality. This fix is only applicable for a network that has a mixture of A-law and U-law codecs configured in the network. Configure all gateways in the network to use same codec type of either A-law or U-law.
This problem is only on Cisco series platform. The hardware version, revision information, and other conditions are displayed wrongly. The port does not go on-hook when a supervisory disconnect tone is sent from the PSTN. If the caller hangs up at this point, the PSTN sends a supervisory disconnect tone to the FXO where no action is taken which results in not freeing up the port immediately.
The IP phone locks during a call to a call forward busy number. When a call is made from phone A to another phone phone C , the call can be answered normally. When a second call is placed from another phone to phone A via a loopback-directory number loopback-dn , the call is forwarded to phone B. Resize Image for Email is a lightweight applicationthat allows you to resize your images and prepare them for email.
Changes:1 Cleaned up the Interface slightly2 Added 2 new options for auto Switch MP3 converter for Mac can convert mp3 files from many sources into wav format.
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