Q: What are the names and model numbers for the HP Advancestack routers?
The HP Advancestack routers include the following models:
- 27285A HP Advancestack Router 440 (Router ER)
- 27286A HP Advancestack Router 445 (Router TR)
- 27287A HP Advancestack Router 470 (Router LR)
- 27288A HP Advancestack Router 430 (Router SR)
- 27289A HP Advancestack Router 240 (Router FR, A version)
- 2 7289B HP Advancestack Router 240 (Router FR, B version)
- 27290A HP Advancestack Router 480 (Router BR)
- J2430A HP Advancestack Router 650
- J2540A HP Router PR (A version)
- J2540B HP Advancestack Router 230 (Router PR, B version)
- J2543A HP Advancestack Router 245 (Router TFR)
- J2628A HP Advancestack Router 210 Module
» Return to top
Q: Where can I find information on how to troubleshoot my router, get examples of configurations, and learn more about different technologies used with my routers?
Refer to the HP Advancestack Router technical documents page which contains various documents on these topics. Also refer to the product manuals.
» Return to top
Q: How do I configure IPX network numbers on my network when installing HP routers?
When installing routers between two sites you must use unique IPX network numbers for both LAN's and the WAN. For the IPX servers you must use unique internal and external network numbers. The LAN router ports must be configured with the same external network number as configured on the server connected to the LAN. Both WAN ports connecting the two site routers are configured with the same network number because they are on the same network. This WAN network number must be unique from all other network numbers within this given autonomous system.
An example of this for connecting two site LAN's would be:
- Set the main site IPX server internal network number to 'A'. At the main site set both the router LAN port IPX network number and the IPX server external network number to 'AA'.
- Set the remote site IPX server internal network number to 'B'. At the remote site set both the router LAN port IPX network number and the IPX server external network number to 'BB'.
- Set the Router WAN port IPX network number on both routers to 'CC'.
- Check that the frame type used on both LAN's match those chosen for 'AA' and 'BB'. For consistency set both WAN ports encapsulation type to be the same, i.e. 'Ethernet 802.
- Reboot the routers and bring up the servers on the network. Log onto the main router and check the log file for circuit status, i.e. 'cct.ether1 enabled'. Check the IPX routing table by issuing the 'rgetir' command from the Network Control Language Interpreter (NCL) command prompt. Check the routing table entries for correct network number, router interface number and that all services are listed.
» Return to top
Q: When and how can you use compression on the WAN links?
Compression can be enabled on any link speed equal to or less than 56 kilobits per second (Kbit/s) (except the HP Router 650). It can be configured on no more than two WAN links of the same router (except the HP Router 650). It will achieve compression ratios up to 4:1, but generally falls into the 2:1 range, depending on the data. The HP Router 650 allows for 256 Kbit/s links with an aggregate CAD throughput of 460 Kbit/s.
» Return to top
Q: How do you configure the HP router for Frame Relay?
The two main issues to consider are configuring the proper management type and the logical topology of the Frame Relay network. If the Frame Relay network represents a logical star between remote sites then poison reverse and split horizon must be disabled. The default management type chosen by the router is ANSI Annex D for router OS A.08.xx and LMI for router OS A.09.xx. The router OS A.09.xx will also support ANSI Annex A as well. You can get this information from the network provider.
» Return to top
Q: Why will the routers not route or connect over the WAN link?
You will need to determine if the router is behaving properly. Check the statistics screen for circuit statistics. If you have Transmit (Tx) or Receive (Rx) errors at less than a one percent rate, the link is probably good. DSU/CSU or Modem clock settings are a common problem. Our router by default is always looking for clock from the DCE which in turn should normally get clock from the telco. Framing problems are common on T1 type circuits. Our router does not care what the framing is, but of course if it is not set properly on the DSU/CSU, matching the T1 service, then bad frames will result. The event log, accessed by the main menu or by typing "log" at the NCL prompt, can give you an indication of the current connection state of the routers across the WAN.
» Return to top
Q: Does the HP J2540A/B Router 230 (PR) support Frame Relay, X.25, OSPF or DECnet Phase IV?
e HP Router PR was designed with peripheral or branch sites in mind. It will bridge as well as route IP and IPX. Although OSPF is not directly supported in the Router PR, it can be successfully integrated into OSPF environments. DECnet and AppleTalk can be bridged. If full Frame Relay, OSPF or X.25 support is required, one of the other HP routers, such as the HP 27289B Router 240, should be purchased.
» Return to top
Q: Can you route IP, IPX or bridge over an ISDN WAN network?
Yes, but there are some issues to consider. IP can use static routes so the ISDN line does not stay up. When you turn RIP and OSPF off, and only use static routes on the WAN, the call can be disconnected when there is no data to transmit. When routing IPX over ISDN, enable Proxy Keep-Alive and set the WAN RIP and SAP period to 60 minutes. You may also need to filter serialization and diagnostic packets sent from the Netware* servers every 60 seconds.
» Return to top
Q: How do I connect from Token Ring to Ethernet?
The HP 27286A Router 445 can do source route bridging between two separate rings traversing an Ethernet or WAN. The HP Router 445 will do translational bridging from Token Rings to Ethernet of SNA and NetBeui. Of course, routed protocols will connect Token Ring to Ethernet, except for DECnet IV.
» Return to top
Q: What files or commands are helpful in troubleshooting?
Please refer to the Operator's Reference or User's Guide for details. Most of the following commands' output can be zput (zmodem) to a PC:
- log -a
- get cct.*
- get IP.*
- get buf.*
- stamp
- browse
- help rget
For IPX routing:
For IP routing:
Simply use this as an example: NCL> ZPUT "log -a" logfile.txt
This will take the output of the log command and put it to a file on a zmodem capable PC.
» Return to top
Q: What typical cables can I use for a connection to the router console port?
HP routers, with the exception of the HP Router 650 and HP Router 210, have a 25-pin female connector as the console port. The HP Router 650 and the HP Router 210 have 9-pin male connectors as console ports. You need to use a RS-232 "Null Modem" cable to connect to the console port of HP routers except the HP Router 650 and HP Router 210.
From a terminal or PC with a 9-pin male serial port to all HP routers except the HP Router 650 and HP Router 210 use the HP 24542G (9-pin female to 25-pin male) cable. The minimum pin-outs for this cable are:
From a terminal or PC with a 25-pin female serial port to all HP routers except the HP Router 650 and HP Router 210 use the HP 13242G (25-pin male to 25-pin male) cable. The minimum pin-outs for this cable are:
From a terminal or PC with a 9-pin male serial port to the HP Router 650 or HP Router 210, use the HP F1047-80002 or 5182-4794 (9-pin female to 9-pin female) console cable. This cable is a cross-over cable and is used for the Router 650 and the Router 210. It is shipped with the Router 650 and also with any Advancestack hub (in which the Router 210 is placed). The 5063-5950 console cable kit comes with the 9-pin female to 9-pin female console cable (HP part number F1047-80002) and two 9-pin to 25-pin adapters (HP part numbers 5181-6640 and 5181-6642) that will effectively create the 9-pin female to 25-pin male cable listed above as HP 24542G.
ERRATA:
The following router "Installation Guide" manuals are INCORRECT:
Routers ER/TR/LR/SR/FR/BR: part #5959-5247 Edition 3 E0593
ERROR: Page A-8 (bottom, 9-pin to 25-pin) shows incorrect crossover between pin 2 and pin 3. It also incorrectly labels the 9-pin end with pin 2 = TX, pin 3 = RX.
CORRECTION: Should be straight-through pin 2 to pin 2 and straight-through pin 3 to pin 3 (for 9-to-25). Also, 9-pin connectors have pin 2 = RX, pin 3 = TX.
Router Series 200 and 400: part #5962-8307 Printed 7/94
ERROR: Page A-6 (bottom, 9-pin to 25-pin) incorrectly labels the 9-pin end with pin 2 = TX, pin 3 = RX.
CORRECTION: 9-pin connectors have pin 2 = RX, pin 3 = TX.
» Return to top
Q: How do I use the "DCE" and "DTE" settings in the HP Router Configuration Editor "Circuits" menu when using WAN Circuit Type = "HP Point To Point"?
This is confusing terminology in our routers, because the actual meaning of DCE (Data Circuit-Terminating Equipment) and DTE (Data Terminal Equipment) refers to modems and terminals/PCs, where the modem is the DCE device and the terminal or PC is the DTE device. For the router circuit configuration, the terms "DCE" and "DTE" are used to mean "the router at one end" and "the router at the other end". It doesn't matter which end is configured as DCE and which end is configured as DTE. What is important is that the routers at each end of an "HP Point To Point" link are not configured with the same "Point to Point Address". If you ever misconfigure an "HP Point To Point" link with the "Point to Point Address" = DCE at both ends (or DTE at both ends), you will get an error message in the event log: "Invalid Configuration: Pt-to-Pt addresses are equal". The WAN link will not come up until you correct the "Point to Point Address" on one router so it is a different value from that of the other router. HP has enhanced the configuration of an "HP Point To Point" link by adding the option "Auto" in the "Point to Point Address" field. With the setting of "Auto", the two routers negotiate to determine which end will come up as DCE and which will be DTE. An informative message in the event log will tell you which value (DCE or DTE) has been assigned to the router to which you are connected.
» Return to top
Q: How do I configure an HP router and HP 28674B Remote Bridge RB to communicate over a WAN?
In the router's Configuration Editor, set the following values in the WAN CIRCUITS screen:
Quality of Service:LLC 2 (reliable) Circuit Type:HP Point To Point
Retry Counter (N2):4 Retry Timer (T1):3
Connect Retries:0
Link Idle Timer (T3):10 Modulus:8
Window Size:7
Point to Point Address:Auto or DCE Minimum Frame Spacing:2
Max Link Latency (ms) (0=none):0 Compression:No Compression
Remote Signal & sense:Inactive Data Link Layer protocol:Standard
Notes:
- The Retry Counter value must be the same on both the router and the bridge. The default value for the HP Remote Bridge RB is 4.
- The Point to Point Address may be set to either Auto or DCE on the router. If set to DCE on the router, the HP Remote Bridge RB must be configured to DTE.
» Return to top
Q: How do I configure the router for Novell Packet Burst (PBURST.NLM)?
The routers are not configured for PBURST. Packet Burst is a function of the Novell server and client configurations. In the Novell IPX Router Spec it says, "No special handling on the part of a router is required for Burst Mode to function properly."
» Return to top
Q: How do I solve a Host Block Allocation failure on my HP Advancestack router?
This situation results in the following entries in the event log:
-> software exception at ip_util.c:332 -- task ID = 41
-> Host block allocation failed, no memory
and refers to a shortage of entries in the router's ARP and PROBE tables.
The fix is to set Host Cache to Yes, which turns on ARP and PROBE cache aging. The default for Host Cache (aging) is No (off).
» Return to top
|
Printable version
