Avaya BayRS Version 15.1.0.0 Notice download pdf (Page 55)

Release Notes for BayRS Version 15.1.0.0

308663-15.1 Rev 00

If you dynamically delete a circuit on the router, the MIB-II attribute

ifNumber decreases by 1. If you check the IfIndex, the result will be

noncontiguous. When the router is polled for ifNumber, it shows the correct

value but when the ifIndex is polled, there is a chance that there are

indexes/circuits outside the correct range.

The result is that SNMP management stations such as Omniview will display

an error.

• If a router receives a Breath of Life (BofL) packet, the router considers it an

unknown protocol. The router increments the MIB entry that tracks unknown

protocols each time an interface receives a BofL packet,

wfIfEntry.wfIfInUnknownProtos. However, you can disable BofL packets for

the interface as a workaround to this problem.

MPLS

The implementation of Multiprotocol Label Switching (MPLS) in BayRS

(Versions 13.10 and later) is based an early draft of the specification developed by

the IETF MPLS working group. BayRS MPLS will not interoperate with ATM

networks where MPLS is implemented in compliance with IETF RFC 3031.

Nortel Networks recommends that you do not use MPLS in BayRS as there are

plans to remove this implementation in a future release.

NAT Services

The following limitations and cautions exist for NAT services in BayRS:

• NAT does not operate in IP ISP Mode. To avoid this problem you should

disable the global IP ISP mode parameter.

• NAT and IPsec cannot interoperate with overlapping source IP address ranges,

because NAT takes precedence. IPsec cannot process a source address that is

also in a NAT address range. However, the following workarounds are

available:

For UNIX systems, you can separate IP hosts on the networks into two

groups: a NAT-only group and an IPsec-only group. You can then use the

multinetted interfaces or two network interface cards on a host to establish

these two logical groups on one physical host.

You can also configure NAT and IPsec on different devices so that one BayRS

router runs IPsec and another BayRS router runs NAT.

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Avaya BayRS Version 15.1.0.0 Notice Page 55