VP Tunnels and VP Switching Some Concepts VP

VP Tunnels and VP Switching Some Concepts VP Switching decision is made solely based on VPI number (unlike both VPI and VCI for VC switching) which reduces administration as well as allows for faster switching of cells. VP Tunnels VP interface is a multiplexing/demultiplexing point on ATM switch at which VC’s from various (ATM interfaces) are aggregated to VP on an Interface. VP’s are ATM connections that are aggregate of multiple VC’s that all have same VPI number. VP’s are most often used across WANs. VP Tunnels and VP Switching © 2001, Cisco Systems, Inc. www. cisco. com 1

VP Tunnels and VP Switching There are 2 major type of ATM connections 1 - VC (Virtual Channel): VC’s are uniquely identified on port of ATM switch by VPI and VCI number. 2 - VP (Virtual Path): VP’s are uniquely identified on ATM port by VPI number on ATM port. Virtual Path VC VP VP VC Transmission Path VC VP VP VC ATM cells arriving on VC are switched based on both VPI and VCI number in cell header. On other hand ATM cells arriving on VP are Switched based on VPI number only. Configuration of ATM switch will determine If switch is supposed to be VC or VP switching For specific VPI/VCI pair or VPI respectively. VP Tunnels and VP Switching © 2001, Cisco Systems, Inc. www. cisco. com 2

VP Tunnels and VP Switching VC and VP Switching Port 1 1 2 VPI/VCI 2/100 2/110 5/110 Port 4 3 4 VPI/VCI 7/110 1/50 7/100 OR VCI 100 VCI 110 VPI 2 Port 1 Port 3 VPI 1 VCI 50 VCI 110 VPI 5 Port 2 Port 4 VPI 7 VCI 100 VCI 110 • A cell is switch at VC or VP level. • VC Switching - Switch receive a cell with a configured VPI and VCI, it lookup its connection table to determine outgoing port (or ports) with new VPI/VCI value. VP Tunnels and VP Switching © 2001, Cisco Systems, Inc. www. cisco. com 3

VP Tunnels and VP Switching Configuring VP Switching Atm 5/1/0 Atm 0/0/1 Atm 0/0/0 interface ATM 5/1/0 interface ATM 0/0/1 interface ATM 0/0/0 no ip address no atm ilmi-keepalive atm pvp 10 interface ATM 0/0/0 10 no atm ilmi-keepalive atm pvp 12 interface ATM 0/0/0 11 ! ! interface ATM 0/0/0. 1 point-to-point interface ATM 5/1/0. 1 point-to-point ip address 1. 1 255. 0 atm pvp 11 interface ATM 0/0/0 11 ip address 1. 1. 1. 2 255. 0 pvc 10/20 encapsulation aal 5 snap ! ! interface ATM 5/1/0. 2 point-to-point interface ATM 0/0/0. 2 point-to-point ip address 2. 1. 1. 1 255. 0 ip address 2. 1. 1. 2 255. 0 pvc 10/30 Check this out pvc 10/30 encapsulation aal 5 snap ! ! interface ATM 5/1/0. 3 point-to-point interface ATM 0/0/0. 3 point-to-point ip address 3. 1. 1. 1 255. 0 ip address 3. 1. 1. 2 255. 0 pvc 11/40 pvc 12/40 VP Tunnels and VP Switching © 2001, Cisco Systems, Inc. www. cisco. com encapsulation aal 5 snap 4

VP Tunnels and VP Switching Show Commands for VP Switching Switch#sh atm vp Interface VPI Type X-Interface ATM 0/0/0 10 PVP ATM 0/0/1 ATM 0/0/0 11 PVP ATM 0/0/1 10 PVP ATM 0/0/0 ATM 0/0/1 12 PVP ATM 0/0/0 Switch#sh atm vp traffi int atm 0/0/0 Interface VPI Type rx-cell-cnts ATM 0/0/0 10 PVP 70 ATM 0/0/0 11 PVP 94 VP Tunnels and VP Switching X-VPI 10 12 10 11 tx-cell-cnts 60 90 © 2001, Cisco Systems, Inc. www. cisco. com Status UP UP 5

VP Tunnels and VP Switching Switch#sh atm vp int atm 0/0/0 10 Show Commands for VP Switching VP Tunnels and VP Switching © 2001, Cisco Systems, Inc. Interface: ATM 0/0/0, Type: oc 3 suni VPI = 10 Status: UP Time-since-last-status-change: 00: 58: 11 Connection-type: PVP Cast-type: point-to-point Cross-connect-interface: ATM 0/0/1, Type: oc 3 suni Cross-connect-VPI = 10 Rx connection-traffic-table-index: 1 Rx service-category: UBR (Unspecified Bit Rate) Rx pcr-clp 01: 7113539 Rx scr-clp 01: none Rx mcr-clp 01: none Rx cdvt: 1024 (from default for interface) Rx mbs: none Tx connection-traffic-table-index: 1 Tx service-category: UBR (Unspecified Bit Rate) Tx pcr-clp 01: 7113539 Tx scr-clp 01: none Tx mcr-clp 01: none Tx cdvt: none Tx mbs: none www. cisco. com 6

VP Tunnels and VP Switching Three different types of VP Tunnels on Cisco Enterprise ATM Switches 1 - Regular or Unshaped VP Tunnels 2 - Shaped VP Tunnels 3 - Hierarchical VP Tunnels and VP Switching © 2001, Cisco Systems, Inc. www. cisco. com 7

VP Tunnels and VP Switching Regular or Unshaped VP Tunnels VP tunnels on which there is no traffic shaping for any ATM service category. VP can be of any service category but can’t be shaped. VC’s in a tunnel have to be of same service category VP tunnel is. VP Tunnels and VP Switching © 2001, Cisco Systems, Inc. www. cisco. com 8

VP Tunnels and VP Switching Configuring VP Tunnels for a Single Service Category Tunnel WAN Tunnel Atm 5/1/0 Atm 0/0/1 Atm 0/0/0 Public PVP Router 1 interface ATM 5/1/0. 1 point-to-point ip address 1. 1 255. 0 pvc 100/32 encapsulation aal 5 snap ! interface ATM 5/1/0. 2 point-to-point ip address 2. 1. 1. 1 255. 0 pvc 100/33 encapsulation aal 5 snap VP Tunnels and VP Switching Switch 1 Atm 0/0/0 Switch 2 interface ATM 0/0/0 no ip address atm pvp 100 ! ! interface ATM 0/0/0. 100 point-to-point no ip directed-broadcast ! no atm ilmi-keepalive interface ATM 0/0/1 ! no ip address interface ATM 0/0/1 atm pvc 100 32 interface ATM 0/0/0. 100 32 no ip address atm pvc 100 40 interface ATM 0/0/0. 100 33 no ip directed-broadcast ! logging event subif-link-status atm ilmi-keepalive atm svcc vci min 100 atm pvc 100 32 interface ATM 0/0/0. 100 32 atm pvc 100 33 interface ATM 0/0/0. 100 33 ! © 2001, Cisco Systems, Inc. www. cisco. com Atm 0/0/0 Router 2 interface ATM 0/0/0. 1 point-to-point ip address 1. 1. 1. 2 255. 0 pvc 100/32 encapsulation aal 5 snap ! interface ATM 0/0/0. 2 point-to-point ip address 2. 1. 1. 2 255. 0 pvc 100/40 encapsulation aal 5 snap ! 9

VP Tunnels and VP Switching Switch#sh atm vp int atm 0/0/0 100 Show Commands for VP VP Tunnels and VP Switching © 2001, Cisco Systems, Inc. Interface: ATM 0/0/0, Type: oc 3 suni VPI = 100 Status: TUNNEL Time-since-last-status-change: 17: 21: 32 Connection-type: PVP Tunnels Cast-type: point-to-point Rx cells: 49968, Tx cells: 50371 Rx connection-traffic-table-index: 1 Rx service-category: UBR (Unspecified Bit Rate) Rx pcr-clp 01: 7113539 Rx scr-clp 01: none Rx mcr-clp 01: none Rx cdvt: 1024 (from default for interface) Rx mbs: none Tx connection-traffic-table-index: 1 Tx service-category: UBR (Unspecified Bit Rate) Tx pcr-clp 01: 7113539 Tx scr-clp 01: none Tx mcr-clp 01: none www. cisco. comcdvt: none 10 Tx

VP Tunnels and VP Switching Show Commands for VP Tunnels Switch#sh atm vp Interface VPI Type X-Interface ATM 0/0/0 100 PVP TUNNEL Switch#sh atm vp traffic int atm 0/0/0 Interface VPI Type rx-cell-cnts ATM 0/0/0 100 PVP 49865 VP Tunnels and VP Switching © 2001, Cisco Systems, Inc. www. cisco. com X-VPI Status tx-cell-cnts 50271 11

VP Tunnels and VP Switching Configuring VP Tunnels for a Single Service Category WAN Atm 5/1/0 Atm 0/0/1 Atm 0/0/0 Router 1 Switch 1 interface ATM 5/1/0. 1 point-to-point ip address 1. 1 255. 0 pvc 100/32 vbr-nrt 50000 40000 100 encapsulation aal 5 snap ! ! interface ATM 5/1/0. 2 point-to-point ip address 2. 1. 1. 1 255. 0 pvc 100/33 vbr-nrt 10000 8000 100 encapsulation aal 5 snap ! Atm 0/0/0 Public PVP Router 2 interface ATM 0/0/0 no ip address atm pvp 100 rx-cttr 7 tx-cttr 7 ! interface ATM 0/0/0. 100 point-to-point no ip directed-broadcast no atm ilmi-keepalive ! interface ATM 0/0/1 no ip address atm pvc 100 32 rx-cttr 8 tx-cttr 8 interface ATM 0/0/0. 100 32 atm pvc 100 33 rx-cttr 9 tx-cttr 9 interface ATM 0/0/0. 100 33 ! Switch 2 interface ATM 0/0/0. 1 point-to-point ip address 1. 1. 1. 2 255. 0 pvc 100/32 vbr-nrt 50000 40000 100 encapsulation aal 5 snap ! interface ATM 0/0/0. 2 point-to-point ip address 2. 1. 1. 2 255. 0 pvc 100/40 vbr-nrt 10000 8000 100 encapsulation aal 5 snap interface ATM 0/0/0 no ip address atm pvp 100 rx-cttr 7 tx-cttr 7 ! interface ATM 0/0/0. 100 point-to-point ! interface ATM 0/0/1 no ip address atm pvc 100 32 rx-cttr 8 tx-cttr 8 interface ATM 0/0/0. 100 32 atm pvc 100 40 rx-cttr 9 tx-cttr 9 interface ATM 0/0/0. 100 33 VP Tunnels and VP Switching © 2001, Cisco Systems, Inc. www. cisco. com 12

VP Tunnels and VP Switching Switch c 8510 m-r 2#sh atm vp int atm 0/0/0 100 Show Commands VP Tunnels and VP Switching © 2001, Cisco Systems, Inc. Interface: ATM 0/0/0, Type: oc 3 suni VPI = 100 Status: TUNNEL Time-since-last-status-change: 00: 43: 49 Connection-type: PVP Cast-type: point-to-point Rx connection-traffic-table-index: 7 Rx service-category: VBR-NRT (Non-Realtime Variable Bit Rate) Rx pcr-clp 01: 100000 Rx scr-clp 0 : 80000 Rx mcr-clp 01: none Rx cdvt: 1024 (from default for interface) Rx mbs: 100 Tx connection-traffic-table-index: 7 Tx service-category: VBR-NRT (Non-Realtime Variable Bit Rate) Tx pcr-clp 01: 100000 Tx scr-clp 0 : 80000 Tx mcr-clp 01: none Tx cdvt: none Tx mbs: 100 www. cisco. com 13

VP Tunnels and VP Switching Minimum Hardware/Software requirements and Type of VP Tunnel supported on Cisco equipment. 1 - Unshaped VP Tunnel of any service category is supported on LS 1010 (with eother FC-PCQ and FC-PFQ), Catalyst 8540 -MSR, Catalyst 8510 -MSR, 7500 series router with PA-A 3 and 7200 series router with PA-A 2 or PA-A 3. Any 11. 2, 11. 3 or 12. 0 IOS supports this feature. VC’s within unshaped tunnel have to be of same Service category that unshaped VP tunnel is. 2 - Shaped VP Tunnel of CBR service category is supported on LS 1010 with FC-PFQ, Catalyst 8510 -MSR, Catalyst 8540 -MSR, 7500 series router with PA-A 3 and 7200 series router with PA-A 2 or PA-A 3. All VC’s Within CBR VP Tunnel have to be of same service category. 2. 1 - Shaped VP Tunnels are first supported in 11. 2(8. 0. 1)FWA 4 vs of IOS 11. 1 and WA 3 release trains do not Support shaped VP Tunnels. 2. 2 - For software vs after 11. 3(0. 8)TWA 4 it is supported for service category of VC’swithin shaped tunnel To be on CBR. 2. 3 - For earlier software vs that do support shaped VP tunnel VC’s within shaped CBR tunnel have to be of CBR service category. 3 - Hierarchical VP Tunnels of CBR service category are supported on LS 1010 with FC-PFQ, Catalyst 8510 -MSR and Catalyst 8540 -MSR. Minimum software requirement is W 5 train of IOS. VP Tunnels and VP Switching © 2001, Cisco Systems, Inc. www. cisco. com 14

VP Tunnels and VP Switching ? ? ? If the VP Service Provider is Policing, the connection will most likely experience cell drops in the Service Provider network. Q: How to overcome this? A: Configure Shaped VP Tunnels and VP Switching © 2001, Cisco Systems, Inc. www. cisco. com 15

VP Tunnels and VP Switching Shaped VP Tunnels that are traffic shaped. They are defined only for CBR service category on Cisco Enterprise ATM Switches. All VC’s within single VP Tunnel must be same service category. The overall output of this VP Tunnel is rate-limited by hardware to the PCR of the tunnel. VP Tunnels and VP Switching © 2001, Cisco Systems, Inc. www. cisco. com 16

VP Tunnels and VP Switching Configuring Shaped VP Tunnels WAN Atm 5/1/0 Atm 0/0/1 Atm 0/0/0 Public PVP Switch 1 atm connection-traffic-table-row index 10 cbr pcr 8000 atm connection-traffic-table-row index 20 vbr-nrt pcr 7000 scr 0 4000 mbs 100 atm connection-traffic-table-row index 30 ubr pcr 8000 atm connection-traffic-table-row index 40 abr pcr 8000 mcr 0 ! interface ATM 0/0/0 no ip address atm pvp 100 shaped rx-cttr 10 tx-cttr 10 atm pvp 110 shaped rx-cttr 10 tx-cttr 10 atm pvp 120 shaped rx-cttr 10 tx-cttr 10 ! interface ATM 0/0/0. 100 point-to-point atm cac service-category cbr deny atm cac service-category vbr-nrt permit ! interface ATM 0/0/0. 110 point-to-point atm cac service-category cbr deny atm cac service-category ubr permit ! interface ATM 0/0/0. 120 point-to-point atm cac service-category cbr deny atm cac service-category abr permit ! interface ATM 0/0/1 no ip address atm pvc 100 32 rx-cttr 20 tx-cttr 20 interface ATM 0/0/0. 100 32 atm pvc 110 40 rx-cttr 30 tx-cttr 30 interface ATM 0/0/0. 110 40 atm pvc 120 50 rx-cttr 40 tx-cttr 40 interface ATM 0/0/0. 120 50 VP Tunnels and VP Switching © 2001, Cisco Systems, Inc. www. cisco. com Atm 0/0/0 Router 1 interface ATM 5/1/0. 1 point-to-point ip address 1. 1 255. 0 pvc 100/32 vbr-nrt 7000 4000 100 encapsulation aal 5 snap ! interface ATM 5/1/0. 2 point-to-point ip address 2. 1. 1. 1 255. 0 pvc 110/40 ubr 8000 ! interface ATM 5/1/0. 3 point-to-point ip address 3. 1. 1. 1 255. 0 pvc 120/50 abr 8000 5000 17

VP Tunnels and VP Switching Configuring Shaped VP Tunnels Switch 2 atm connection-traffic-table-row index 10 cbr pcr 8000 atm connection-traffic-table-row index 20 vbr-nrt pcr 7000 scr 0 4000 mbs 100 atm connection-traffic-table-row index 30 ubr pcr 8000 atm connection-traffic-table-row index 40 abr pcr 8000 mcr 0 ! interface ATM 0/0/0 no ip address atm pvp 100 shaped rx-cttr 10 tx-cttr 10 atm pvp 110 shaped rx-cttr 10 tx-cttr 10 atm pvp 120 shaped rx-cttr 10 tx-cttr 10 ! interface ATM 0/0/0. 100 point-to-point atm cac service-category cbr deny atm cac service-category vbr-nrt permit ! interface ATM 0/0/0. 110 point-to-point atm cac service-category cbr deny atm cac service-category ubr permit ! interface ATM 0/0/0. 120 point-to-point no atm ilmi-keepalive atm cac service-category cbr deny atm cac service-category abr permit ! interface ATM 0/0/1 no ip address atm pvc 100 32 rx-cttr 20 tx-cttr 20 interface ATM 0/0/0. 100 32 atm pvc 110 40 rx-cttr 30 tx-cttr 30 interface ATM 0/0/0. 110 40 atm pvc 120 50 rx-cttr 40 tx-cttr 40 interface ATM 0/0/0. 120 50 VP Tunnels and VP Switching © 2001, Cisco Systems, Inc. Router 2 interface ATM 0/0/0. 1 point-to-point ip address 1. 1. 1. 2 255. 0 pvc 100/32 vbr-nrt 7000 4000 100 encapsulation aal 5 snap ! interface ATM 0/0/0. 2 point-to-point ip address 2. 1. 1. 2 255. 0 pvc 110/40 ubr 8000 ! interface ATM 0/0/0. 3 point-to-point ip address 3. 1. 1. 2 255. 0 pvc 120/50 abr 8000 5000 www. cisco. com 18

VP Tunnels and VP Switching Show Commands for Shaped VP Tunnels Switch#sh atm vp int atm 0/0/0 Interface VPI Type X-Interface X-VPI Status ATM 0/0/0 100 PVP SHAPED TUNNEL ATM 0/0/0 110 PVP SHAPED TUNNEL ATM 0/0/0 120 PVP SHAPED TUNNEL Switch#sh atm vp traffic int atm 0/0/0 Interface VPI Type rx-cell-cnts ATM 0/0/0 100 PVP 1438 ATM 0/0/0 110 PVP 1374 ATM 0/0/0 120 PVP 755 VP Tunnels and VP Switching © 2001, Cisco Systems, Inc. www. cisco. com tx-cell-cnts 1446 1384 772 19

VP Tunnels and VP Switching Show Commands for Shaped VP Tunnels Switch#sh atm int atm 0/0/0. 110 Interface: IF Status: VP Tunnels and VP Switching ATM 0/0/0. 110 Port-type: vp tunnel UP Admin Status: up © 2001, Cisco Systems, Inc. www. cisco. com 20

VP Tunnels and VP Switching Restrictions for Shaped VP tunnels 1 - LS 1010 with FC-PFQ and Catalyst 8510 -MSR support maximum of 2 x 64=128 shaped VP Tunnels: 64 shaped VP Tunnels are supported on x/0/y numbered ports and 64 on x/1/y numbered ports. 2 - Catalyst 8540 -MSR supports maximum of 8 x 64=512 shaped VP tunnels: maximum of 64 shaped VP tunnels Can be defined on each of the following interface groups: (0/0/x, 1/0/x), (0/1/x, 1/1/x), (2/0/x, 3/0/x), (2/1/x, 3/1/x), (9/0/x, 10/0/x), (9/1/x, 10/1/x), (11/0/x, 12/0/x), and (11/1/x, 12/1/x). 3 - The bandwidth of the shaped VP tunnel is shared by the active VC’s inside the tunnel in strict round-robin (RR) fashion. 4 - Shaped VP tunnels do not support merged VC’s for tag switching. 5 - UBR+ and ABR VC’s with non-zero MCR are not allowed on a shaped VP tunnel interface. 6 - A maximum of 128 VC’s can transit s shaped VP tunnel interface. VP Tunnels and VP Switching © 2001, Cisco Systems, Inc. www. cisco. com 21

VP Tunnels and VP Switching ? ? ? Q: What if I have more than 1 service category and cann’t buy more than 1 VP Tunnel? A: Configure Hierarchical VP Tunnels and VP Switching © 2001, Cisco Systems, Inc. www. cisco. com 22

VP Tunnels and VP Switching Hierarchical VP Tunnels that are traffic shaped and support VC’s of multiple service categories to co-exist in tunnel at the same time. VP Tunnels and VP Switching © 2001, Cisco Systems, Inc. www. cisco. com 23

VP Tunnels and VP Switching Configuring Hierarchical VP Tunnels for Multiple Services Categories WAN Atm 5/1/0 Atm 0/0/1 Atm 2/1/1 Atm 0/0/0 Public PVP Atm 0/0/0 Atm 2/1/0 Switch 1 atm hierarchical-tunnel atm connection-traffic-table-row index 20 vbr-nrt pcr 7000 scr 0 4000 mbs 100 atm connection-traffic-table-row index 30 ubr pcr 8000 atm connection-traffic-table-row index 40 abr pcr 8000 mcr 0 atm connection-traffic-table-row index 50 cbr pcr 50000 ! interface ATM 0/0/0 no ip address no ip directed-broadcast logging event subif-link-status atm pvp 100 hierarchical rx-cttr 50 tx-cttr 50 ! interface ATM 0/0/0. 100 point-to-point no ip directed-broadcast no atm ilmi-keepalive ! interface ATM 0/0/1 no ip address no ip directed-broadcast logging event subif-link-status atm pvc 100 32 rx-cttr 20 tx-cttr 20 interface ATM 0/0/0. 100 32 atm pvc 100 40 rx-cttr 30 tx-cttr 30 interface ATM 0/0/0. 100 40 atm pvc 100 50 rx-cttr 40 tx-cttr 40 interface ATM 0/0/0. 100 50 VP Tunnels and VP Switching © 2001, Cisco Systems, Inc. www. cisco. com Router 1 interface ATM 5/1/0. 1 point-to-point ip address 1. 1 255. 0 pvc 100/32 vbr-nrt 7000 4000 100 encapsulation aal 5 snap ! interface ATM 5/1/0. 2 point-to-point ip address 2. 1. 1. 1 255. 0 pvc 100/40 ubr 8000 encapsulation aal 5 snap ! interface ATM 5/1/0. 3 point-to-point ip address 3. 1. 1. 1 255. 0 pvc 100/50 abr 8000 5000 encapsulation aal 5 snap 24

VP Tunnels and VP Switching Configuring Hierarchical VP Tunnels for Multiple Services Categories Switch 2 atm hierarchical-tunnel atm connection-traffic-table-row index 20 vbr-nrt pcr 7000 scr 0 4000 mbs 100 atm connection-traffic-table-row index 30 ubr pcr 8000 atm connection-traffic-table-row index 40 abr pcr 8000 mcr 0 atm connection-traffic-table-row index 50 cbr pcr 50000 ! interface ATM 2/1/0 no ip address atm pvp 100 hierarchical rx-cttr 50 tx-cttr 50 ! interface ATM 2/1/0. 100 point-to-point ! interface ATM 2/1/1 no ip address atm pvc 100 32 rx-cttr 20 tx-cttr 20 interface ATM 2/1/0. 100 32 atm pvc 100 40 rx-cttr 30 tx-cttr 30 interface ATM 2/1/0. 100 40 atm pvc 100 50 rx-cttr 40 tx-cttr 40 interface ATM 2/1/0. 100 50 VP Tunnels and VP Switching © 2001, Cisco Systems, Inc. www. cisco. com Router 2 interface ATM 0/0/0. 1 point-to-point ip address 1. 1. 1. 2 255. 0 pvc 100/32 vbr-nrt 7000 4000 100 encapsulation aal 5 snap ! interface ATM 0/0/0. 2 point-to-point ip address 2. 1. 1. 2 255. 0 pvc 100/40 ubr 8000 encapsulation aal 5 snap ! interface ATM 0/0/0. 3 point-to-point ip address 3. 1. 1. 2 255. 0 pvc 100/50 abr 8000 5000 encapsulation aal 5 snap 25

VP Tunnels and VP Switching Show Commands for Hierarchical VP Tunnels Switch#sh atm vp Interface VPI Type X-Interface X-VPI ATM 2/1/0 100 PVP HIE. TUNNEL Status Switch#sh atm resource Resource configuration: Sustained-cell-rate-margin-factor 1% Abr-mode: EFCI Hierarchical Scheduling Mode : enabled *****TRUNCATED****** Switch#sh atm vp traffic int atm 2/1/0 100 Interface VPI Type rx-cell-cnts tx-cell-cnts ATM 2/1/0 100 PVP 2451 2470 VP Tunnels and VP Switching © 2001, Cisco Systems, Inc. www. cisco. com 26

VP Tunnels and VP Switching Show Commands for Hierarchical VP Tunnels Switch#sh atm vp int atm 2/1/0 100 Interface: ATM 2/1/0, Type: oc 3 suni VPI = 100 Status: HIE. TUNNEL Time-since-last-status-change: 00: 49: 16 Connection-type: PVP Cast-type: point-to-point Rx cells: 2214, Tx cells: 2234 Rx connection-traffic-table-index: 50 Rx service-category: CBR (Constant Bit Rate) Tx connection-traffic-table-index: 50 Tx service-category: CBR (Constant Bit Rate) Tx pcr-clp 01: 50000 Tx scr-clp 01: none Tx mcr-clp 01: none Tx cdvt: none Tx mbs: none VP Tunnels and VP Switching © 2001, Cisco Systems, Inc. www. cisco. com 27

VP Tunnels and VP Switching Restriction for Hierarchical VP Tunnels 1 - LS 1010 with FC-PFQ, Catalyst 5500 with ASP and FC-PFQ and Catalyst 8510 -MSR support maximum of 62 hierarchical VP Tunnels. 2 - Hierarchical VP Tunnels can only be defined on ports in slots 0 and 3 on LS 1010 and Catalyst 8510 -MSR. Hierarchical VP Tunnels can be defined in slots 9 and 11 on Catalyst 5500 with ASP and FC-PFQ. 3 - LS 1010 equiped with FC-PFQ and ASP-B supports maximum of 30 hierarchical VP tunnels on ports 0/0/z And 3/0/z combined, and maximum of 32 on ports 0/1/z and 3/1/z combined. Use “sh hardware” command to Find out type of ASP and feature card. 4 - LS 1010 equiped with FC-PFQ and ASP-C as well as Catalyst 8510 -MSR support maximum of 30 Hierarchical VP tunnels on ports 0/y/z and maximum of 32 on ports 3/y/z. 5 - On Catalyst 5500 with ASP and FC-PFQ Maximum of 30 hierarchical VP tunnels can be defined on ports 9/0/z and 11/0/7 combined. Maximum of 32 hierarchical VP tunnels can be defined on ports 9/1/z and 11/1/z Combined. 6 - On Catalyst 8540 -MSR hierarchical VP tunnels can be defined on slots 0, 2, 9 and 11. VP Tunnels and VP Switching © 2001, Cisco Systems, Inc. www. cisco. com 28

VP Tunnels and VP Switching Restriction for Hierarchical VP Tunnels 7 - Maximum number of hierarchical VP Tunnels varies between 120 and 240 depending on type of PAM’s Used. If all the ports are Super PAM’s (full with modules) the maximum number of VP tunnels supported Is 240. If all the ports installed are Supper Cam’s with LS 1010 PAM’s maximum number of hierarchical VP tunnels is 120. 8 - Hierarchical VP tunnels can not co-exist with any other type of connection (VC’s, VP’s, Tag VC’s regular Or shaped VP tunnels etc. ) on the same physical interface. So, the only type of connection that can coexist With hierarchical VP tunnel on same physical interface are additional hierarchical VP tunnels and well Known VC’s (signaling 0/5, PNNI, 0/18, ILMI 0/16 etc. ). 9 - Hierarchical VP Tunnels can support only ATM Forum VC’s or only Tag VC’s, but not both at the same time. 10 - When doing OIR (on line insertion and removal) of PAM that has hierarchical VP tunnels configured For its ports, configuration of hierarchical tunnel will be preserved. So if same PAM is inserted back In hierarchical VP Tunnel will automaticly be active. However, if different type of PAM is to be inserted It is strongly recommended that any configured hierarchical VP Tunnel (on port about to be removed) be Deleted prior to physical removal of PAM. VP Tunnels and VP Switching © 2001, Cisco Systems, Inc. www. cisco. com 29

VP Tunnels and VP Switching Some Acronyms VP: virtual path VC: virtual channel VPI: virtual path identifier VCI: virtual channel identifier ABR: available bit rate CBR: constant bit rate UBR: unspecified bit rate VBR-nrt: variable bit rate – no real time VBR-rt: variable bit rate – real time PCR: peak cell rate SCR: sustained cell rate MBS: maximum burst size FC-PFQ: feature card- per flow queueing VP Tunnels and VP Switching © 2001, Cisco Systems, Inc. www. cisco. com 30