Removing the
firewall-packet filter
command
from the interface does not work
The command must be completed with the
“inbound” or “outbound” keyword
1.1.5. Link Layer Protocol
Symptom Solution
North American ISDN protocol types cannot be
configured on a PRI interface.
DSS1 is the only supported protocol type.
The LMI Encapsulation type on the 3Com
routers is called Non-Standard.
If the frame relay peer is set to LMI, set the
Local Interface to Non-Standard.
Router 3000 series routers do not auto-
negotiate with the 3Com SSII Dual Speed Hub
500.
Adjust the speed and duplex manually on both
devices so they match. Disable negotiation
mode.
The
dialer disconnect B-channel
command
uses a timeslot numbering scheme.
The
dialer disconnect B-channel
command
takes a timeslot as an argument. Timeslot 16 is
the D channel; the timeslot numbering for the
B-channels is 1-15 and 17-31. To disconnect
B-channel 30 the user must specify timeslot 31.
Defining an SDLC controller address preceded
by the hexadecimal designator, ‘0x’ results in
‘Invalid Address’ message.
Omit the hexadecimal ‘0x’ when defining an
SDLC address.
Changing a link from MFR to MP can result in a
router reboot
When changing from an MFR configuration to a
MP configuration, shut down all the physical
interfaces used by the Virtual-Template.
Save the configuration, reboot the router and
undo shutdown on the physical interfaces.
1.1.6. Network Protocol
Symptom Solution
IGMP query timer defaults to 60.
Set the query timer, manually, to 125.
Naming inconsistency with interface and IPX
static routes.
When configuring a static route for a network
that begins with an alpha character, preface
the network with 0x.
IPX RIP entries are not aged-out at the user-
defined interval.
The IPX RIP table entries are removed from
the table if updates for those entries are not
received within the default interval of 180
seconds. This value is based upon a default
RIP update timer of 60 seconds and a default
multiplier of 3.
IPX SAP services’ timer and multiplier value
configurations are ignored.
IPX SAP updates are received once a minute
regardless of configuration settings.
NAT translates the global interface IP address
as well as all internal addresses. Thus, all
traffic going out of the NAT interface is
translated, including all local interface IP
addresses on the router.
Any IP address (especially that of the global
NAT interface) that was not intended for NAT,
should be denied translation in an access list.
Deny
the NAT outbound interface address with
an Access List.
Refer to 3Com Knowledgebase solution
3KB9241 for more details.
RTP header compression is not fully supported
in this release.
RTP header compression is not fully supported
in this release.
Load balancing does not work through
recursive lookup.
Use MP or OSPF to support load balancing.
3Com Router Release Notes for V1.20
6