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Administrative Access Filters—Filtering SNAP Frames on Output Example
Configuring Source-Route Bridging BC-161
Administrative Access Filters—Filtering SNAP Frames on Output Example
Figure 68 shows a router connecting four Token Rings.
Figure 68 Router Filtering SNAP Frames on Output
The following example allows only AppleTalk Phase 2 packets to be source-route bridged between
Token Rings 0 and 1, and allows Novell packets only to be source-route bridged between Token
Rings 2 and 3.
source-bridge ring-group 5
!
interface tokenring 0
ip address 131.108.1.1 255.255.255.0
source-bridge 1000 1 5
source-bridge spanning
source-bridge input-type-list 202
!
interface tokenring 1
ip address 131.108.11.1 255.255.255.0
source-bridge 1001 1 5
source-bridge spanning
source-bridge input-type-list 202
!
interface tokenring 2
ip address 131.108.101.1 255.255.255.0
source-bridge 1002 1 5
source-bridge spanning
source-bridge input-lsap-list 203
!
interface tokenring 3
ip address 131.108.111.1 255.255.255.0
source-bridge 1003 1 5
source-bridge spanning
source-bridge input-lsap-list 203
!
! SNAP type code filtering
! permit ATp2 data (0x809B)
! permit ATp2 AARP (0x80F3)
access-list 202 permit 0x809B 0x0000
access-list 202 permit 0x80F3 0x0000
access-list 202 deny 0x0000 0xFFFF
!
! LSAP filtering
! permit IPX (0xE0E0)
Token
Ring 4
Router A
Token
Ring 1
T0
T3
S1277a
Token
Ring 3
Token
Ring 2
T2
Ring
group 5
T1