6
{
When two active IRF fabrics merge, the master in each IRF fabric considers itself as the master, and the
system skips to rule
2.
Member with higher priority.
3.
Member with the longest system uptime.
Two members are considered to start up at the same time if the difference between their startup times is
equal to or less than 10 minutes. For members starting up at the same time, rule
applies.
4.
Member with the lowest bridge MAC address.
Q.
What IRF fabric topologies does the switch support?
A.
The switch supports ring and daisy-chain topologies, but not the full mesh topology.
Q.
What benefits does the IRF ring topology provide?
A.
The IRF ring topology provides the following benefits:
•
Increased forwarding capacity
—In a daisy-chain topology, any two IRF members have only one
forwarding path. In a ring topology, any two IRF member devices have two forwarding paths. Traffic is
distributed over the paths depending on the hop count between the ingress and egress devices.
•
High availability
—The failure of one IRF link does not cause the IRF fabric to split as in a daisy-chain
topology. Instead, the IRF fabric changes to a daisy-chain topology without interrupting network services.
Q.
Why can't IRF physical interfaces forward data traffic at the wire speed across chassis in an IRF fabric?
A.
The IRF physical interfaces add an IRF header to each packet before they forward the packets to the neighbor
IRF member. The IRF header uses part of the bandwidth.
Q.
What device models does the S7500E-XS switch support as PEXs in an IRF 3 system?
A.
The switch supports the following devices as PEXs:
•
S5120-HI series:
{
S5120-52SC-HI.
{
S5120-28SC-HI.
•
S5130-EI series:
{
S5130-28S-EI.
{
S5130-52S-EI.
{
S5130-28F-EI.
{
S5130-28S-PWR-EI.
{
S5130-28S-HPWR-EI.
{
S5130-52S-PWR-EI.
{
S5130-28TP-EI.
{
S5130-52TP-EI.
{
S5130-28TP-PWR-EI.
{
S5130-52TP-PWR-EI.
•
S6300 series:
