The following figure shows a sample IP Shortcuts over SPBM deployment.
Examples and network illustrations in this document may illustrate only one of the supported platforms. Unless otherwise noted, the concept illustrated applies to all supported platforms.
The following sections show the steps required to configure the SPBM IP Shortcuts parameters in this example. You must first configure basic SPBM and IS-IS infrastructure. For more information, see SPBM and IS-IS Infrastructure Fundamentals.
Note the following:
IP IS-IS redistribution needs to be configured to inject IP shortcuts routes into IS-IS. The one exception is the circuitless IP address configured as the IS-IS ip-source-address. This address is automatically advertised without the need for a redistribution rule.
In the displayed configuration, only direct routes are injected (the same configuration is possible for static routes). To inject IPv6 routes, you must enable route redistribution of IPv6 direct, IPv6 static, and OSPFv3 routes into IS-IS.
No IP address needs to be configured on SwitchG.
The following sections show the steps required to configure the SPBM IP Shortcuts parameters in this example.
CIRCUITLESS INTERFACE CONFIGURATION - GlobalRouter interface loopback 1 ip address 1 10.0.0.1/255.255.255.255 exit ISIS CONFIGURATION router isis ip-source-address 10.0.0.1 ISIS SPBM CONFIGURATION spbm 1 ip enable exit VLAN CONFIGURATION vlan create 13 type port-mstprstp 0 vlan members 13 1/2 portmember interface Vlan 13 ip address 10.0.13.1 255.255.255.0 exit IP REDISTRIBUTION CONFIGURATION - GlobalRouter router isis redistribute direct redistribute direct metric 1 redistribute direct enable exit IP REDISTRIBUTE APPLY CONFIGURATIONS isis apply redistribute direct
CIRCUITLESS INTERFACE CONFIGURATION - GlobalRouter interface loopback 1 ip address 1 10.0.0.2/255.255.255.255 exit ISIS CONFIGURATION router isis ip-source-address 10.0.0.2 ISIS SPBM CONFIGURATION spbm 1 ip enable exit VLAN CONFIGURATION vlan create 14 type port-mstprstp 0 vlan member add 14 1/2 interface Vlan 14 ip address 10.0.14.1 255.255.255.0 exit IP REDISTRIBUTION CONFIGURATION - GlobalRouter router isis redistribute direct redistribute direct metric 1 redistribute direct enable exit IP REDISTRIBUTE APPLY CONFIGURATIONS isis apply redistribute direct
SwitchC:1# show isis spbm ip-unicast-fib
===============================================================================================================
SPBM IP-UNICAST FIB ENTRY INFO
===============================================================================================================
OUTGOING SPBM PREFIX PREFIX IP ROUTE
VRF ISID Destination NH BEB VLAN INTERFACE COST COST TYPE PREFERENCE AREA AREA-NAME
----------------------------------------------------------------------------------------------------------------
GRT - 10.0.0.2/32 SwitchD 4000 1/30 20 1 Internal 7 HOME area-9.00.02
GRT - 10.0.14.1/24 SwitchD 4000 1/30 20 1 Internal 7 HOME area-9.00.02
----------------------------------------------------------------------------------------------------------------
Home : Total number of SPBM IP-UNICAST FIB entries 2
Remote: Total number of SPBM IP-UNICAST FIB entries 0
----------------------------------------------------------------------------------------------------------------
SwitchC:1# show ip route
================================================================================
IP Route - GlobalRouter
================================================================================
NH INTER
DST MASK NEXT VRF COST FACE PROT AGE TYPE PRF
--------------------------------------------------------------------------------
10.0.0.1 255.255.255.255 10.0.0.1 - 1 0 LOC 0 DB 0
10.0.0.2 255.255.255.255 SwitchD Glob~ 20 4000 ISIS 0 IBS 7
10.0.13.1 255.255.255.0 10.0.13.1 - 1 13 LOC 0 DB 0
10.0.14.1 255.255.255.0 SwitchD Glob~ 20 4000 ISIS 0 IBS 7
4 out of 4 Total Num of Route Entries, 4 Total Num of Dest Networks displayed.
TYPE Legend:
I=Indirect Route, D=Direct Route, A=Alternative Route, B=Best Route, E=Ecmp Rout
e,
U=Unresolved Route, N=Not in HW, F=Replaced by FTN, V=IPVPN Route, S=SPBM Route
PROTOCOL Legend:
v=Inter-VRF route redistributed
SwitchD:1# show isis spbm ip-unicast-fib
======================================================================================================================
SPBM IP-UNICAST FIB ENTRY INFO
======================================================================================================================
OUTGOING SPBM PREFIX PREFIX IP ROUTE
VRF ISID Destination NH BEB VLAN INTERFACE COST COST TYPE PREFERENCE AREA AREA-NAME
----------------------------------------------------------------------------------------------------------------------
GRT - 10.0.0.1/32 SwitchC 4000 1/20 20 1 Internal 7 HOME area-9.00.02
GRT - 10.0.13.1/24 SwitchC 4000 1/20 20 1 Internal 7 HOME area-9.00.02
-----------------------------------------------------------------------------------------------------------------------
Home : Total number of SPBM IP-UNICAST FIB entries 2
Remote: Total number of SPBM IP-UNICAST FIB entries 0
--------------------------------------------------------------------------------
SwitchD:1# show ip route
================================================================================
IP Route - GlobalRouter
================================================================================
NH INTER
DST MASK NEXT VRF COST FACE PROT AGE TYPE PRF
--------------------------------------------------------------------------------
10.0.0.1 255.255.255.255 SwitchC Glob~ 20 4000 ISIS 0 IBS 7
10.0.0.2 255.255.255.255 10.0.0.2 - 1 0 LOC 0 DB 0
10.0.13.1 255.255.255.0 SwitchC Glob~ 20 4000 ISIS 0 IBS 7
10.0.14.1 255.255.255.0 10.0.14.1 - 1 14 LOC 0 DB 0
4 out of 4 Total Num of Route Entries, 4 Total Num of Dest Networks displayed.
TYPE Legend:
I=Indirect Route, D=Direct Route, A=Alternative Route, B=Best Route, E=Ecmp Rout
e,
U=Unresolved Route, N=Not in HW, F=Replaced by FTN, V=IPVPN Route, S=SPBM Route
PROTOCOL Legend:
v=Inter-VRF route redistributed