Cisco CallManager 3. Prior to the SRS Telephony feature, when the WAN connection between the remote branch office router and the Cisco CallManager failed or connectivity with the Cisco CallManager was lost for some reason, the Cisco IP phones at the branch office became unusable for the duration of the failure.
The SRS Telephony feature overcomes this problem and enables the basic features of the Cisco IP phones by providing call-handling support on the branch office router for its attached Cisco IP phones.
The system automatically detects the failure and uses the Simple Network Auto Provisioning SNAP technology to autoconfigure the branch office router to provide call processing for the local Cisco IP phones. Old Cisco MIBs will be replaced in a future release. This defect can be exploited to produce a denial of service DoS attack. This is not the same defect as CSCdr The vulnerability has been corrected and Cisco is making fixed releases available for free to replace all affected IOS releases.
Customers are urged to upgrade to releases that are not vulnerable to this defect. This vulnerability can only be exploited if the enable password is known or not set. You are strongly encouraged to read the complete advisory, which is available at. The squeeze command, which is used to erase all files marked for deletion on a Flash file system, is now available on Cisco and Cisco series routers.
The old range was 0 to The new range is -6 to 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.
As this call is received, the original call is incorrectly cleared by the node on phone C while the call is still shown as "up" on phone A. When this condition occurs, phone A is no longer able to place or receive calls and has to be powered down to be restored to working condition.
This module also provides V phantom power to PBXs and key switches that require it. The typical application of BRI-NT allows enterprise customers with a large installed base of legacy telephony equipment to bypass the public telephone network.
This card gives users the flexibility to configure the BRI port to either the user side or the network side. When configured as the network side, the router provides ISDN network-side services. Users with all types of PBXs can send calls through a Cisco router and deliver those calls across the customer network. However, note that the older card does not provide phantom power.
The customer's connection can take a clock source from one port on any of these interfaces applies to both the original and new hardware and source that clock to any of the other interfaces. It is possible to support NT and TE on the same module. The consideration is to ensure that clocking is configured correctly.
The only consideration is to ensure that clocking is configured correctly so that no clock collision occurs. Even though the router is acting as the network side, an ISDN phone is not supported and thus should not be connected directly to the BRI ports on the router.
Other switch types will only be supported as user side. The PBX is usually is the trunk circuit side and the telco, CO, or Cisco voice enabled platform is the signaling unit side.
This is the interface a standard telephone provides. The FXO is on the switch end of the connection. It plugs directly into the line side of the switch so the switch thinks the FXO interface is a telephone. Ports on this VIC are color-coded pink. The FXO sits on the switch end of the connection. The following sections describe the new software features supported by the Cisco series routers for Release The internationalization and localization enhancements in Cisco CallManager 3.
This will enable users to invoke network-specific services and facilities on a call-by-call basis when a user dials the route pattern. The following sections describe important notes concerning the new software features supported by the Cisco series routers for Release In some instances, when the command show diag is entered, the message "Unknown field" is displayed.
This is due to the fact that in some instances the card information is not pre-programmed for the following voice interface cards:.
No workaround is in place since this does not affect the functionality of the voice interface cards. The following sections describe limitations concerning the new hardware and software features supported by the Cisco series routers for Release When the ADSL link is intended to support both voice and data traffic simultaneously, the link should be configured for either all fast-path data or all interleave data, with an interleave depth of zero to ensure that latency is minimized.
In addition, the total supported data rate must be reduced to adjust for the reduced coding gain, which is usually present with high-latency traffic. Caveats describe unexpected behavior or defects in the Cisco IOS software releases. Severity 1 caveats are the most serious caveats, severity 2 caveats are less serious, and severity 3 caveats are the least serious of these three severity levels. These documents list severity 1 and 2 caveats; the documents are located on Cisco.
Note If you have an account with Cisco. MIB Object Type. Object Description. Access lists can be used to control which broadcasts are forwarded. Broadcasts stay within the VRF domain, even if there is a duplicate address of the destination interface in a different VRF or in a global routing interface.
This enhancement provides customers additional flexibility to determine what information is provided within the option remote ID suboption and option circuit ID suboption. The default is to provide the MAC address of the switch. Available in the IP Base images for the Catalyst and switches. Table 3. Cisco Catalyst Series Advanced Services.
0コメント