Configuring SPX ports and LAGs on a live system
To prevent connection issues, the
multi-spx-lag command changes both ends of a live CB-to-PE or PE-to-PE link at the same time to
form an SPX LAG. The
multi-spx-port command transforms a live SPX LAG into a single-port SPX link. Both the
multi-spx-port
and
multi-spx-lag commands are available in SPX CB configuration mode and SPX unit configuration modes.
multi-spx-port or
multi-spx-lag command if the command would make any PE unreachable.
For more information on SPX LAG formation and using port lists, refer to Differences in Campus Fabric configuration practices.
no mutli-spx-port or
no multi-spx-lag command to remove a live SPX link (two SPX ports) or a live SPX LAG in order to break
a ring of PE units into one or two chains. Both ends of the live link become data
ports that are administratively disabled in the configuration. These commands can
be used as an alternative to physically disconnecting the links to break a ring of
PEs.
The following example changes a live SPX LAG to a live link between CB unit 3 and PE unit 24.
ICX7750-26Q Router# configure terminal ICX7750-26Q Router(config)# spx cb-config ICX7750-26Q Router(config-spx-cb)# multi-spx-port 3/1/8 and 24/4/1 spx-lag 3/1/6 3/1/8 is replaced by spx-port 3/1/8. spx-lag 24/3/1 24/4/1 is replaced by spx-port 24/4/1.
The following example creates a live SPX LAG between PE unit 17 and PE unit 24 as part of configuring PE unit 24 from the CB in SPX unit configuration mode.
ICX7750-26Q Router# configure terminal ICX7750-26Q Router(config)# spx unit 24 ICX7750-26Q Router(config-spx-unit-24)# multi-spx-lag 24/2/1 to 24/2/2 and 17/2/1 17/2/2 spx-port 17/2/1 is replaced by spx-lag 17/2/1 to 17/2/2. spx-port 24/2/1 is replaced by spx-lag 24/2/1 to 24/2/2.
The following example removes SPX ports between PE 24 and PE 25.
ICX7750-26Q Router(config)# spx cb-configure
ICX7750-26Q Router(config-spx-cb)# no multi-spx-port 24/2/1 and 25/2/3
Bring down 24/2/1 and 25/2/3
Wait for 20 sec before removing spx-ports. These ports will be disabled in configuration.
ICX7750-26Q Router(config-spx-cb)# end
ICX7750-26Q Router# show spx
T=22h55m20.8: alone: standalone, D: dynamic cfg, S: static
ID Type Role Mac Address Pri State Comment
1 S ICX7750-26QXG active cc4e.2439.2a80 128 local Ready
2 S ICX7750-26QXG standby cc4e.2439.3700 0 remote Ready
3 S ICX7750-48XGC member cc4e.2439.1680 0 remote Ready
17 S ICX7150-C12P spx-pe 609c.9fbc.bf26 N/A remote Ready
18 S ICX7150-48ZP spx-pe 609c.9fee.4320 N/A remote Ready
23 S ICX7450-48GF spx-pe cc4e.246c.f850 N/A remote Ready
24 S ICX7450-48P spx-pe 609c.9fc2.3090 N/A remote Ready
25 S ICX7250-24 spx-pe cc4e.24df.0ade N/A remote Ready
standby active
+---+ +---+ +---+
3/1| 2 |2/1==2/1| 1 |3/1==3/1| 3 |2/1
+---+ +---+ +---+
+----+
3/1/41==1/7| 17 |
+----+
+----+
3/1/17==1/1| 18 |
+----+
+----+ +----+
2/3/6--4/1| 23 |3/1--4/1| 24 |2/1-
+----+ +----+
+----+
3/1/15--1/1| 25 |2/3-
+----+
Standby u2 - protocols ready, can failover
ICX7750-26Q Router# spx-port 24/2/1 is removed
spx-port 25/2/3 is removed