This release note describes the features and caveats for Cisco 700 software Release 4.2(3.5) and earlier. For complete documentation for Cisco 700 software, refer to the Cisco 700 Series Command Reference.
This release enhances Always On/Dynamic ISDN (AO/DI) to include Reverse Charge, a feature that allows the router to specify an X.25 call as collect. It also gives the router the ability to work with leased lines that have been configured as two independent 64-kbps streams.
This document has the following sections:
Cisco 700 series router software Release 4.2(3.5) supports the following routers:
| Cisco 760 Series | Cisco 770 Series |
|---|---|
Cisco 761 | Cisco 771 |
Cisco 762 | Cisco 772 |
Cisco 765 | Cisco 775 |
Cisco 766 | Cisco 776 |
The following documentation is provided with your Cisco 700 series router:
This section provides information that was not included in the current documentation and is not available elsewhere. The information will be included in the next revision of the documentation.
The Cisco 700 series router attempts to establish a connection with the remote host whenever interesting traffic is queued to be sent over a WAN connection. When bridging is off, the router attempts to connect to the remote device when IP traffic is queued. When bridging is on (default), the router attempts to connect when IP traffic and all nonrouted traffic is queued.
It is recommended that bridging be set to off in a WAN profile to reduce the amount of interesting traffic, and therefore, the number of attempts made to establish a connection. If the remote connection goes down, the router continuously attempts to bring up the line. In some environments (most commonly Windows NT using only NetBIOS), this causes the line to dial continuously. Depending on your configuration and how your connection is billed, turning bridging off in the WAN profile might reduce your costs.
For example, in the Cisco 700 Series Router Installation Guide (Routing IP On Demand), you should enter the command set bridge off near Step 11. The exact sequence of this command in relation to the other commands is not critical, as long as it is done in the central902 profile.
The set clicallback command was left out of early online versions and the paper copy of the Cisco 700 Series Router Command Reference. The command was replaced in the online version and is available on Cisco Connection Online (CCO), and the August, 1998, and later Documentation CDs.
In North America, call forwarding is available with NI1 Capability Package EZ-1. The feature is known as call forwarding variable (CFV). It forwards incoming calls to another number. You can turn the feature on or off using the access codes provided by your ISDN service provider.
The Cisco 700 series router software Release 4.2(3.5) provides the following enhancements:
A PPP (Point-to-Point Protocol) header option has been added to this command. In previous software versions, when multilink is enabled and only one link is available, all data packets are sent with multilink headers. This unnecessarily increases network overhead when a PPP header would be acceptable. The PPPHeader option of the set ppp multilink command specifies that when only one link is up, the data packets can be sent with a PPP header. A complete description of this command is provided in the Cisco 700 Series Router Command Reference. (CSCdk36022 and CSCdk47348)
To configure the way that PPP links are aggregated, use the set ppp multilink command.
SEt PPp MUltilink PPPHeader ON | OFf
ON | Uses the PPP header when only one link is up (default). |
|---|---|
OFf | Always uses the multilink header. |
The reverse-charge request feature makes X.25 calls collect calls and has been added to this command. A complete description of this command is provided in the Cisco 700 Series Router Command Reference.
To turn Always On/Dynamic ISDN (AO/DI) on, use the set aodi command.
SEt AOdi ON | OFf [NUA=nua] [POwerupenable] [REversechargerequest ON | OFf]
ON | AO/DI is configured. |
OFf | AO/DI is not configured. |
NUA | The X.121 address of the destination. This is a required parameter if AO/DI is on. |
POwerupenable | The D channel X.25 SVC established at power up. The SVC is established only for active profiles. |
REversechargerequest | Reverses the charges (makes a call collect) of an X.25 call when set to on. The default is off. |
This command displays the AO/DI settings and is new in this version of the software.
To display the parameters for AO/DI, use the show aodi command.
SHow AOdiSystem or profile mode
The following example displays the AO/DI parameters:
Host> show aodi AODI ON or OFF NUA 686887987 REVERSE CHARGE REQUEST ON or OFF
show config
show connection
show demand
show status
show timeout
The reverse charge request feature makes X.25 calls collect calls and has been added to this command. A complete description of this command is provided in the Cisco 700 Series Router Command Reference.
To route a specific IP packet to the target IP host through an X.25 D channel and provide the parameters needed for a X.25 D channel connection, use the set x25d policy command.
SEt X25d POlicy LSvc=x HOst IP address [TCP | UDP | ICMP] [Port xx] [REversechargerequest ON | OFf]
LSvc | Logical switched virtual circuit (LSVC) number, where x is an LSVC number from 1 to 4). |
HOst IP address | IP address of the host. |
TCP, UDP, and ICMP | Protocols supported by the X.25 D channel. |
Port xx | Port number, where xx is the port number. (See the "Port Assignments" appendix for a list of port numbers.) |
REversechargerequest | Reverses the charges (makes a call collect) when set to on. The default is off. |
The following example shows the output of the command:
Host> show x25d policy
LSVC NUA NUI IP Address Prot Port Idle Reverse ------------------------------------------------------------------------ 1 12345678901234 192.168.253.128 ALL 1234 3000 ON 2 12345678901234 192.168.253.128 ALL 0 3000 OFF 3 12345678901234 192.168.253.128 ALL 0 3000 OFF 4 12345678901234 192.168.253.128 ALL 0 3000 OFF
The perm2x64 feature has been added to the set switch command has been added to this version. This parameter enables the router to use both of the 64-kbps data streams for connecting to the remote end. Using Multilink PPP (MLP) in this mode, the B channels are bundled together to total 128 kbps. A complete description of this command is provided in the Cisco 700 Series Router Command Reference. (CSCdk48224)
To configure the central office switch, use the set switch command.
SEt SWitch 5Ess | DMS | NI-1 | INS | VN3 | NET3 | 1TR6 | TPH | PERM64 | PERM128 | PERM2X64When the unit is set in PERM128 mode, only one PPP session runs at 128 kbps and both B channels must be synchronized. PERM2X64 mode bundles the B channels even if they are not synchronized.
This section provides the latest information about Cisco 700 series router software Release 4.2(3.5) limitations. Each item includes the Cisco DDTS tracking number, if applicable.
AO/DI is available only on one connection. Even if it is enabled on multiple profiles, only one profile at a time can use it. (no number available)
Multilink lost fragment detection level is overly strict when running multilink because of the possibility of out-of-order packets. This is most noticeable when there is only one link in the bundle and the peer continues to use multilink headers. The workaround is to set the peer maximum transmission unit (MTU) to 1450 bytes to prevent fragmentation of layer-2 packets. This is a Cisco IOS limitation. (CSCdk36295)
A Cisco IOS router does not process PPP packets received on a link after it has sent a terminate-request (TERMREQ) even though it had not received a terminate-acknowledge (TERMACK) from the peer. This causes multilink fragments to be dropped prematurely and requires a reset. This is a Cisco IOS limitation. (CSCdk35787)
The Cisco 700 series router refuses to accept incoming calls. After receiving a set asynchronous balanced mode, extended (SABME) signal from the switch, if the next incoming call has the same call reference as the previous incoming call, the router ignores this setup in call control. Call control appears to have a call control block (CCB) with this call reference. Call control ignores this setup because it assumes that the switch has retransmited the setup message. This CCB should have been deallocated when the SABME was received. (CSCdk55873)
This section provides the latest information about Cisco 700 series router software Release 4.2(3.5) caveats. Each item includes the Cisco DDTS tracking number, if applicable.
If the Cisco 700 series router is pinged from the WAN with a packet larger than 1473 bytes and Port Address Translation (PAT) enabled, the router does not respond properly. The ping is successful if you use the Windows ping client, and the ping and the packet is under 1472byte. This defect has no impact on applications. This has been resolved in software Release 4.2(3.5). (CSCdk54661)
For INS images, the default delay value was incorrect. The acceptable range value for the set delay command is from 90 to 32767. This has been resolved in software Release 4.2(3.5). (CSCdj20565)
The router ignores the timeout and advice of charge (AOC) information. This has been resolved in software Release 4.2(3.5). (CSCdk14254)
Changing the IP address in Standard or User profiles to 0.0.0.0 disables IP routing. This has been resolved in software Release 4.2(3.5). (CSCdk47969)
The console might display an error message indicating an invalid magic number with an echo-reply if PPP dialog is turned on. This message is a cosmetic problem, and it has been resolved in software Release 4.2(3.5). (CSCdk36343)
The router splits multilink packets into uneven fragments. This causes the incorrect ordering of packets when used in a virtual private dial-up network (VPDN). This has been resolved in software Release 4.2(3.5). (CSCdk38841)
When compression is on, multilink is enabled, a file starts to transfer, and the second B channel is brought up and placed into the bundle or the second B channel is removed from the bundle, a sequence error occurs. If both links are up when the file transfer begins, the file transfers properly. There were a number of reasons for this. The router did not update the sequence number of the next expected packet, and packets were delivered out of order. This has been resolved in software Release 4.2(3.5). (CSCdk38850)
When a Cisco 700 series router and a Cisco IOS router connect across an ISDN link, multilink is enabled, and 1600-byte packets are used to ping from a Cisco IOS router to the Cisco 700 series router, the ping fails. When 1600-byte packets are used to ping a PC connected to the LAN side of a Cisco 700 series router, the ping is successful. This has been resolved in software Release 4.2(3.5). (CSCdk47350)
RIP updates keep the ISDN link up if the idle timeout is greater than the RIP timer value, even if the RIP option is linkup. However, it does not cause the link to come up by itself. To correct the problem, use a filter for RIP traffic with the ignore option in the WAN profile. (no number available)
The system password is echoed over the ISDN connection the first time the connection is established. However, it is not echoed in subsequent connections. This has been resolved in software Release 4.2(3.5). (CSCdj81519)
This section describes the applications supported by the Cisco 700 series router software Release 4.2(3.5).
The CiscoSecure Authentication Agent (available for Windows 95 and Windows NT 4.0) application simplifies the use of token authentication over ISDN. There are two authentication modes: single authentication and double authentication.
The Cisco 700 series router operates in single authentication mode when Token Authentication Support (TAS) is enabled. CiscoSecure Authentication Agent is available on the Cisco Website. See the "Cisco Connection Online" section in this document for more information.
Cisco 700 series router software Release 4.0(1) and higher supports the Cisco 700 Fast Step software. Cisco 700 Fast Step software simplifies the setup, configuration, and monitoring of Cisco 700 series routers.
Cisco 700 Fast Step runs on Microsoft Windows 95, Windows 98, and Windows NT systems. It is provided with your router on the Cisco Fast Step CD-ROM. The application is also available on Cisco Connection Online. See the "Cisco Connection Online" section in this document for more information.
This section describes the process for saving the current configuration and updating the router software image. The default image for Cisco 761, Cisco 765, Cisco 771, and Cisco 775 routers is NET3, IR. The default image for all other Cisco 700 series routers is US.
Images for software Release 4.0(1) and higher require 1.5 MB of dynamic RAM (DRAM). If you do not have enough DRAM to support the software, the router does not boot. Refer to the "National ISDN Capability Packages" section for instructions on checking the amount of DRAM. Instructions for increasing the amount of DRAM are in the Cisco 700 Series Router Installation Guide.
X.25 images require 1.5 MB of DRAM and 1 MB of Flash memory. If you do not have enough Flash memory to run X.25 images, the router must be replaced with a Cisco 700M series router. The label on the bottom of the router identifies an M-series router. You can display the amount of Flash memory by using the version command. Refer to the Cisco 700 Series Router Command Reference for information about this command.
The following example saves the configuration to a file by using Terminal for Windows, a common terminal emulation software program:
Step 1 When the terminal emulation program is running, enter the upload command at the command-line prompt, but do not press Return after you enter the command:
Step 2 From the Transfer menu, select Receive Text File.
Step 3 In the Receive Text dialog box, specify a filename to save the configuration in, and select the directory where you want to save the file.
Step 4 Click OK.
Step 5 Return to the terminal emulation program, and press Return to execute the command. The configuration is saved to the file specified in Step 3.
Step 6 Click Stop when the configuration has finished uploading. You are ready to download the software.
Select the image (filename) for your router. Table 1, Table 2, and Table 3 list the filename and memory required for each image. Images named C760 are for use with both Cisco 760 and Cisco 770 series routers.
| UNIX Filename | DOS Name | Description | Flash Memory Required | DRAM Required |
|---|---|---|---|---|
c760-in.b-US.42-3.5 | 80146204 | C760/C770 Series Internet Ready Feature Set, United States 4.2(3.5) | 0.5 MB | 1.5 MB |
c760-in.b-NET3.42-3.5 | 80146304 | C760/C770 Series Internet Ready Feature Set, Europe 4.2(3.5) | 0.5 MB | 1.5 MB |
c760-in.b-1TR6.42-3.5 | 80146404 | C760/C770 Series Internet Ready Feature Set, Germany 4.2(3.5) | 0.5 MB | 1.5 MB |
c760-in.b-TPH.42-3.5 | 80145504 | C760/C770 Series Internet Ready Feature Set, Australia 4.2(3.5) | 0.5 MB | 1.5 MB |
c760-in.b-INS.42-3.5 | 80146604 | C760/C770 Series Internet Ready Feature Set, Japan 4.2(3.5) | 0.5 MB | 1.5 MB |
| 1Internet Ready images do not support IPX routing. |
| UNIX Filename | DOS Name | Description | Flash Memory Required | DRAM Required |
|---|---|---|---|---|
c760-in.r-US.42-3.5 | 80147204 | C760/C770 Series Remote Office Feature Set, United States 4.2(3.5) | 0.5 MB | 1.5 MB |
c760-in.r-NET3.42-3.5 | 80147304 | C760/C770 Series Remote Office Feature Set, Europe 4.2(3.5) | 0.5 MB | 1.5 MB |
c760-in.r-1TR6.42-3.5 | 80147404 | C760/C770 Series Remote Office Feature Set, Germany 4.2(3.5) | 0.5 MB | 1.5 MB |
c760-in.r-TPH.42-3.5 | 80147504 | C760/C770 Series Remote Office Feature Set, Australia 4.2(3.5) | 0.5 MB | 1.5 MB |
c760-in.r-INS.42-3.5 | 80147604 | C760/C770 Series Remote Office Feature Set, Japan 4.2(3.5) | 0.5 MB | 1.5 MB |
| UNIX Filename | DOS Name | Description | Flash Memory Required | DRAM Required |
|---|---|---|---|---|
c760-in.rxd-US.42-3.5 | 80147204 | C760/C770 Series X.25/B&D Feature Set, United States 4.2(3.5) | 1 MB | 1.5 MB |
c760-in.rxd-NET3.42-3.5 | 80147304 | C760/C770 Series X.25/B&D Feature Set, Europe 4.2(3.5) | 1 MB | 1.5 MB |
c760-in.rxd-INS.42-3.5 | 80147604 | C760/C770 Series X.25/B&D Feature Set, Japan 4.2(3.5) | 1 MB | 1.5 MB |
If you are loading software from a floppy disk, read and follow the swl (software load) command instructions in the Cisco 700 Series Router Command Reference. If you are loading software from a CD, read and follow the swl (software load) command instructions in the CD booklet.
The following example loads the configuration by using Terminal for Windows, a common terminal-emulation software program:
Step 1 From the terminal-emulation program, select Text Transfer from the Setting menu. The Text Transfer dialog box appears.
Step 2 Set flow control to Line at a Time, and set Delay Between Lines from 0.5 to 1 second.
Step 3 Click OK.
Step 4 From the Transfer menu, select Send Text File.
Step 5 Select the file to be loaded, such as the one you saved in Step 2 in the "Saving a Configuration" section.
Step 6 Click OK. The parameters are transferred to your router.
Step 7 If errors occur during the transfer, enter the set default command, increase the delay between lines, and repeat the procedure for loading the configuration, beginning with Step 1.
A capability package is a set of standardized BRI line features that simplifies the process of configuring an ISDN line. The capability package ordering codes described in this section apply to NI1.
Package S provides alternate voice and circuit-switched data with no additional features. When a minimum feature set is needed, Package S is the preferred NI1 capability package for Cisco 765, Cisco 766, Cisco 775, and Cisco 776 routers.
Package EZ-1 (also referred to as Capability Package U) provides alternate voice and circuit-switched data with all the features and capabilities of the router enabled. Package EZ-1 is the preferred NI1 capability package for the Cisco 765, Cisco 766, Cisco 775, and Cisco 776 routers. The features include flexible calling (conference calling, call transfer, hold and retrieve), ACO (call waiting), and Call Forward Busy (CFB).
If you have any problems with your NI1 provisioning, contact Cisco ISDN Support Services (United States only). To access this service or to obtain more information, call (800) 553-NETS (6387) and select the Customer Service option, or visit the Cisco ISDN web site at www.cisco.com/isdn.
When provisioning multiple directory numbers for a NI1, additional provisioning information that activates the distinctive ringing feature is available from Cisco ISDN Support Services; however, the flexible calling features (three-way conference calling call transfer, hold and retrieve) are not available.
ISDN Support Services are only available in the United States. To access this service or to obtain more information, call 800 553-NETS (6387) and select the Customer Service option, or visit the Cisco ISDN Web site at www.cisco.com/isdn.
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