Troubleshooting the SWAN Concentrator and WAN Subsystem

Verifying the SWAN Concentrator Cabling
The front panel of the ServerNet wide area network (SWAN) concentrator contains two RJ-45 10Base-T
twisted-pair Ethernet ports, which are used to connect the SWAN concentrator to the NonStop S-series
server. Ethernet connections can be made directly to Ethernet 4 ServerNet adapters (E4SAs) or Fast
Ethernet ServerNet adapters (FESAs) using special UTP Ethernet crossover cables, or indirectly through
Ethernet hubs. The figure shows the Ethernet ports on a SWAN concentrator.
The following rules must be followed when connecting the SWAN concentrator to a NonStop S-series
server:
The SWAN concentrator has two distinct paths labeled path A and path B. Path A corresponds to
the preferred NonStop TCP/IP process, subnet, and logical interface (LIF) and path B corresponds
to the alternate TCP/IP process, subnet, and LIF. The cable connected to path A must be
connected to the E4SA port associated with the preferred TCP/IP process, subnet, and LIF; the
cable connected to path B must be connected to the E4SA or FESA port associated with the
alternate TCP/IP process, subnet, and LIF. The cables cannot be reversed.
●
The Internet Protocol (IP) addresses associated with the preferred and alternate TCP/IP processes
configured for the SWAN concentrator must be on different subnets. Therefore, the cables
connected to path A and path B must be connected to different Ethernet segments. (Each physical
segment of a local area network (LAN) is defined as a different subnet.)
●
If the cables are reversed or are connected to the same Ethernet segment, event message 1509 is
generated:
WANBoot: BOOTP received on wrong PATH for TRACKID
<configuration-track-id>, CLIP <clip-n
umber>,
IP Address <ip-address>, PATH <path-name>
To verify the Ethernet cables connected to the SWAN concentrator, do the following:
1 Make sure that the cables connected to path A and path B on the SWAN concentrator are
connected to the correct ports on the correct Ethernet adapters.
Use the SCF INFO ADAPTER command to determine the preferred and alternate
TCP/IP processes and the IP addresses that support the SWAN concentrator:
a.
INFO ADAPTER $ZZWAN.#<adapter-name>
The example shows the output of this command and explains how to interpret it.
Use the SCF INFO SUBNET command for each TCP/IP process you found using the
SCF INFO ADAPTER command to determine the LIFs associated with the TCP/IP
processes and IP addresses that support the SWAN concentrator:
INFO SUBNET $<pref-tcpip-process>.*
INFO SUBNET $<alt-tcpip-process>.*
The example shows the output of these commands.
b.
Use the SCF INFO LIF command for each LIF you found using the SCF INFO
SUBNET command to determine the E4SA or FESA ports configured for the SWAN
concentrator:
INFO LIF $ZZLAN.<lif-name>
INFO LIF $ZZLAN.<lif-name>
c.