Data Sheet
ETHERNET INTERFACE
The following Ethernet ports are available:
•
One network port
•
One network/user port
•
One user port.
The Ethernet ports accept a wide range of
Gigabit and Fast Ethernet SFP-based fiber
optic and electric, as well as built-in UTP
interfaces.
The unit can also be ordered with Fast
Ethernet interfaces only (IPmux-24/FE).
ETHERNET CAPABILITIES
IPmux-24 features an internal bridge,
operating in VLAN-aware and
VLAN-unaware modes.
VLAN stacking is used for traffic
separation between different users or
services, by defining a service provider
VLAN ID per customer or service. When
VLAN stacking is used, a service provider
VLAN tag is added to the user traffic and
removed from network traffic. Both
service provider VLAN ID and service
provider VLAN priority can be defined.
IPmux-24 provides four priority queues for
each port or pseudowire traffic flow. User
traffic can be prioritized according to
VLAN priority, DSCP, IP Precedence or per
port.
Ingress and egress rate can be limited per
user and network port. Rate limitation is
configured per packet type.
ETHERNET RING TOPOLOGIES
A G.8032 Layer-2 Ethernet ring is used by
IPmux-24 for traffic protection. This
technology builds a logical ring, defined as
a set of IEEE 802.1-compliant bridges, and
protects against link and node failures. To
achieve this, every node in the ring has
two bridge ports connected to adjacent
nodes. The ring itself is constructed
independently of the transport technology
used at the server layer. Failures in the
ring are detected by using Ethernet OAM
(Y.1731) continuity check (CC) messages
between adjacent nodes.
In addition, the unit employs Resilient
Ethernet Ring technology to construct a
self-healing Ethernet fiber ring topology
(ring resiliency is similar to that of
SDH/SONET networks). In case of link
failure on any segment of the ring, the
pseudowire traffic is rerouted within
50 ms. A single ring supports up to
16 nodes.
ETHERNET LINK PROTECTION
The unit performs link aggregation (LAG)
based on 802.3ad requirements.
Dual homing technology (1:1) allows
IPmux-24 to be connected to two
different upstream devices.
PSEUDOWIRE TRAFFIC PROTECTION
Pseudowire traffic can be backed up at
the pseudowire connection level. This
allows setting a different path for the
primary and secondary PW bundles. Both
bundles can be routed to the same or
different destinations and operate in the
1+1 and 1:1 modes.
In 1:1 redundancy with two remote
devices the PW bundles in the remote
units operate in “mate” mode. In this
mode each device monitors traffic on a
mate bundle and transfers data only when
the other bundle is inactive.
Figure 2. Private or Leased Line over PSN
