CISCO RSP3 Route Switch Processor Instruction Manual

: June 14, 2024
: Cisco

Table of Contents

RSP3 Route Switch Processor
Product Information
Specifications
Description
Feature History
Product Usage Instructions
Configuring Static MPLS Labels on Cisco RSP3 Module
Core Configuration
- FAQ
Q: What is the benefit of using static labels over dynamic
Q: Is there an increase in the overall knowledge base processor
Q: Is the scale increase specific to any template?
- Read User Manual Online (PDF format)
- Download This Manual (PDF format)

RSP3 Route Switch Processor

Product Information

Specifications

Supported on Cisco RSP3 module
Supported on NCS 4206/4216 routers
MPLS label range increased from 32,768 to 40,960
Allows provisioning of Any Transport over Multiprotocol (AToM)
label switching static pseudowire

Description

The Support for Static MPLS Labels feature allows you to
provision an Any Transport over Multiprotocol (AToM) label
switching static pseudowire without the use of a directed control
connection. This is especially useful in environments that do not
or cannot use directed control protocols. This feature is supported
on Cisco RSP3 module and NCS 4206/4216 routers.

Feature History

Feature Name	Release Information

Increased MPLS label scale support Cisco IOS XE Cupertino
17.7.1| –
Support for Static MPLS Labels on Cisco IOS XE Bengaluru 17.5.1
Cisco RSP3 Module| –

Product Usage Instructions

Configuring Static MPLS Labels on Cisco RSP3 Module

Note: Whenever the “mpls label range” command is used to modify
the dynamic and static labels range, it is recommended to reload
the router.

Core Configuration

The following configuration examples are for SONET VT-15 CEP
mode. This section shows the core configuration including the
loopback, MPLS label range, OSPF, and SR configurations. These
configurations need to be performed only once at the beginning.

FAQ

Q: What is the benefit of using static labels over dynamic

labels?

A: Static labels provide advantages over dynamic labels as they
allow you to manually configure local labels to an IPv4 prefix per
VRF. They also overcome the restriction of limited targeted LDP
sessions scale.

Q: Is there an increase in the overall knowledge base processor

(KBP) scale?

A: No, there is no increase in the overall KBP scale allocated
for the IPv4 Prefix and MPLS ingress labels due to this scale
increase. The overall scale remains to be 163k.

Q: Is the scale increase specific to any template?

A: No, this scale increase is not specific to any template. It
is applicable on all templates.

Support for Static MPLS Labels on Cisco RSP3 Module

Table 1: Feature History

Feature Name

Release Information

Increased MPLS label scale support Cisco IOS XE Cupertino 17.7.1

Support for Static MPLS Labels on Cisco IOS XE Bengaluru 17.5.1 Cisco RSP3 Module

Description
Starting with Cisco IOS XE Cupertino 17.7.1 release, the MPLS label range is increased from 32,768 to 40,960 to configure the dynamic label range.
This feature allows you to provision an Any Transport over Multiprotocol (AToM) label switching static pseudowire without the use of a directed control connection. In environments that do not or cannot use directed control protocols, this feature provides a means for provisioning the pseudowire parameters statically at the Cisco IOS Command-Line Interface (CLI). This feature is supported on Cisco RSP3 module.
This feature is supported on NCS 4206/4216 routers.

Before Cisco IOS XE Bengaluru Release 17.5.1, pseudowires were dynamically provisioned using Label Distribution Protocol (LDP), or another directed control protocol such as Resource Reservation Protocol over traffic-engineered tunnels (RSVP-TE), to exchange the various parameters required for these connections.
Starting with Cisco IOS XE Bengaluru Release 17.5.1, you can provision an Any Transport over Multiprotocol (AToM) label switching static pseudowire without the use of a directed control connection. In environments that do not or cannot use directed control protocols, a means for provisioning the pseudowire parameters statically at the Cisco IOS CLI is provided by the AToM Static Pseudowire feature.

Support for Static MPLS Labels on Cisco RSP3 Module 1

Support for Static MPLS Labels on Cisco RSP3 Module
The MPLS static feature enables you to statically assign local labels to an IPv4 prefix per VRF. Also, Label Switched Paths (LSPs) can be provisioned for these static labels by specifying the next-hop information that is required to forward the packets containing static label. Static labels are more advantageous than dynamic labels because static labels:
· Improve security because the risk of receiving unwanted labels from peers (running a compromised MPLS dynamic labeling protocol) is reduced.
· Provide you with the full control over defined LSPs. · Utilize system resources optimally because dynamic labeling is not processed.
Static Label Pseudowire Provisioning for CEM also overcomes the restriction of limited 1400 (1-dimensional) targeted LDP sessions scale. The feature allows you to manually configure the following parameters:
· Local Pseudowire Label · Remote Pseudowire Label
This feature is supported on the following CEM IMs: · 1-port OC-48 1/ STM-16 or 4-port OC-12/OC-3 / STM-1/STM-4 + 12-Port T1/E1 + 4-Port T3/E3 CEM Interface Module · 1-port OC-192 Interface module or 8-port Low Rate Interface Module (ASR 900 Combo 8-port SFP GE and 1-port 10GE IM with CEM, 10G) · 48-port T3/E3 CEM Interface Module · 48-port T1/E1 CEM Interface Module · NCS 4200 1-Port 10 Gigabit MR + 8-Port 20 Gigabit LR CEM, iMSG Interface Module
MPLS Label Range The MPLS label range configuration helps you to configure the dynamic label range. Any label that falls outside this dynamic range is available for manually allocating as static labels. The router does not verify statically configured labels against the specified label range. Therefore, to prevent label discrepancy, ensure that you do not configure static MPLS labels that fall within the dynamic label range. Starting with Cisco IOS XE Bengaluru Release 17.5.1, the overall range for MPLS label is from 16 through 32768. Both the static and dynamic labels must be allocated within this range. For example, if you configure the dynamic label range from 16 through 32700, you can only configure the static label range from 32701 through 32767. The number of lookup labels or local labels that are supported in Cisco RSP3 module as of Cisco IOS XE Bengaluru Release 17.5.1 is 32k. To increase the scale value, CEM pseudowires both dynamic service labels and statics service labels must be increased. MPLS label range must be increased more than 39k to maintain a consistent configuration across the pDCS (dynamic service labels) and pADM (static service labels). To support 13k CEM PW protection, 13440 is required for dynamic + 13440 for static + 10k global block + 2k SRLB/SRMS = 38880 total labels needed. To support this requirement, the mpls label range is extended from 32k to 40k starting with Cisco IOS XE Cupertino Release 17.7.1.
Support for Static MPLS Labels on Cisco RSP3 Module 2

Support for Static MPLS Labels on Cisco RSP3 Module

Configuring Static MPLS Labels on Cisco RSP3 Module

Note Whenever the mpls label range command is used to modify the dynamic and static labels range, we recommend that you reload the router.
There is no increase in the overall knowledge base processor (KBP) scale that is allocated for the IPv4 Prefix and MPLS ingress labels due to this scale increase. The overall scale remains to be 163k. If 40k MPLS ingress labels are in use, then only 123k IPv4 prefixes can be used.
Note The scale increase is supported only for ingress labels with KBP. No change in scale of EoMPLS and VPLS pseudowires. Also, this change is not specific to any template, but it is applicable on all the templates.
· Configuring Static MPLS Labels on Cisco RSP3 Module, on page 3 · Verification of Static Label Pseudowire Provisioning for CEM Configuration, on page 6
Configuring Static MPLS Labels on Cisco RSP3 Module
This section shows the configuration of static MPLS labels on Cisco RSP3 module for CEM. In the figure below, the serial interfaces are configured on Customer Edge (CE) routers (CE1 and CE2). The Xconnect is configured on the Provider Edge (PE) routers (PE1 and PE2). Unlike the process where the LDP protocol assigns the MPLS labels, you can manually configure the static labels on PE1 and PE2 routers. The CEM groups are configured on PE1 and PE2 routers. The traffic originating from the CE1 router is sent to the PE2 router, where the packets are converted and are finally sent to the CE2 router.
The following configuration examples are for SONET VT-15 CEP mode. Core Configuration: This section shows the core configuration including the loopback, MPLS label range, OSPF, and SR configurations. You need to perform these configurations only once at the beginning.
· For PE1:
interface Loopback0 no ip address ip address 10.1.1.1 255.0.0.0 end l2 router- id 10.1.1.1 end mpls label range 28032 32767 static 16 15998 mpls ldp label allocate global prefix-list DENYALL multilink bundle-name authenticated end segment-routing mpls global-block 16000 28031 local-block 15999 15999 connected-prefix-sid-map address-family ipv4
Support for Static MPLS Labels on Cisco RSP3 Module 3

Configuring Static MPLS Labels on Cisco RSP3 Module

Support for Static MPLS Labels on Cisco RSP3 Module

10.1.1.1/32 absolute 16001 range 1 exit-address-family end no router ospf 100 end router ospf 100 router-id 10.1.1.1 segment-routing area 0 mpls fast- reroute per-prefix enable prefix-priority high fast-reroute per-prefix ti-lfa fast-reroute keep-all-paths network 10.1.1.1 255.0.0.0 area 0 network 192.168.1.0 255.255.0.0 area 0 end interface Port-channel1 ip address 192.168.1.1 255.255.0.0 ip ospf network point-to-point ip ospf mtu-ignore end interface Te0/11/0 no ip address cdp enable channel-group 1 mode active end network-clock input-source 1 interface Te0/11/0 network-clock synchronization automatic network-clock synchronization mode qL-enabled network-clock wait-to- restore 0 global esmc process end
· For PE2:
interface Loopback0 no ip address ip address 10.2.2.2 255.0.0.0 end l2 router- id 10.2.2.2 end mpls label range 28032 32767 static 16 15998 mpls ldp label allocate global prefix-list DENYALL multilink bundle-name authenticated end segment-routing mpls global-block 16000 28031 local-block 15999 15999 connected-prefix-sid-map address-family ipv4 10.2.2.2/32 absolute 16002 range 1 exit-address-family end no router ospf 100 end router ospf 100 router-id 10.2.2.2 segment-routing area 0 mpls fast-reroute per-prefix enable prefix- priority high fast-reroute per-prefix ti-lfa fast-reroute keep-all-paths network 10.2.2.2 255.0.0.0 area 0 network 192.168.1.0 255.255.0.0 area 0 end interface Port-channel1 ip address 192.168.1.2 255.255.0.0

Support for Static MPLS Labels on Cisco RSP3 Module 4

Support for Static MPLS Labels on Cisco RSP3 Module

Configuring Static MPLS Labels on Cisco RSP3 Module

ip ospf network point-to-point ip ospf mtu-ignore end interface Te0/4/0 no ip address cdp enable channel-group 1 mode active end network-clock synchronization automatic network-clock synchronization mode qL-enabled esmc process end
Controller Configuration:
This section shows the controller configuration of the routers.
· For CE 1:
controller sonet 2/1/0 framing sonet end controller sonet 2/1/0 no shut end controller sonet 2/1/0 sts-1 1 mode vt-15 vtg 1 t1 1 channel-group 0 timeslots 1-24 end interface Serial2/1/0.1/1/1:0 ip address 172.16.0.1 255.240.0.0 end
· For PE1:
controller mediatype 0/7/4 mode sonet controller sonet 0/7/4 rate OC12 end controller sonet 0/7/4 sts-1 1 mode vt-15 vtg 1 vt 1 cem-group 0 cep end
· For PE2:
controller mediatype 0/3/2 mode sonet controller sonet 0/3/2 rate OC12 end controller sonet 0/3/2 sts-1 1 mode vt-15 vtg 1 vt 1 cem-group 0 cep end
· For CE 2:
controller sonet 3/0/0 framing sonet end

Support for Static MPLS Labels on Cisco RSP3 Module 5

Verification of Static Label Pseudowire Provisioning for CEM Configuration

Support for Static MPLS Labels on Cisco RSP3 Module

controller sonet 3/0/0 no shut end controller sonet 3/0/0 sts-1 1 mode vt-15 vtg 1 t1 1 channel-group 0 timeslots 1-24 end interface Serial3/0/0.1/1/1:0 ip address 172.16.0.2 255.240.0.0 end
Xconnect Configuration:
This section shows the Xconnect configuration of PE1 and PE2 routers.
· For PE1:
interface cem 0/7/4 cem 0 xconnect 10.2.2.2 1 encapsulation mpls manual mpls label 16 16 end interface cem 0/7/4 cem 1 xconnect 10.2.2.2 2 encapsulation mpls manual mpls label 17 17 end
· For PE2:
interface cem 0/3/2 cem 0 xconnect 10.1.1.1 1 encapsulation mpls manual mpls label 16 16 end interface cem 0/3/2 cem 1 xconnect 10.1.1.1 2 encapsulation mpls manual mpls label 17 17 end
Verification of Static Label Pseudowire Provisioning for CEM
Configuration
With Xconnect Configuration:
· Use the show run | i mpls label command to verify the MPLS label configuration:
Router# show run | i mpls label mpls label range 16 32700 static 32701 32767
interface CEM0/4/2 no ip address cem 0
xconnect 10.3.3.3 1 encapsulation mpls manual mpls label 32702 32702
· Use the show mpls l2 vc vc-id detail command to display detailed information related to the virtual connection (VC) with the signaling protocol manual configuration:

Support for Static MPLS Labels on Cisco RSP3 Module 6

Support for Static MPLS Labels on Cisco RSP3 Module

Verification of Static Label Pseudowire Provisioning for CEM Configuration

Router# show mpls l2 vc 1 detail

Local interface: CE0/4/2 up, line protocol up, SATOP T1 0 up

Destination address:10.3.3.3, VC ID:1 , VC status: up

Output interface: Po1, imposed label stack {16005 32702}

Preferred path: not configured

Default path: active

Next hop: 10.10.1.6

Create time: 00:00:54, last status change time: 00:00:54

Last label FSM state change time: 00:00:54

Signaling protocol: Manual

Status TLV support (local/remote) : enabled/N/A

LDP route watch

: enabled

Label/status state machine

: established, LruRru

Last local dataplane status rcvd: No fault

Last BFD dataplane

status rcvd: Not sent

Last BFD peer monitor status rcvd: No fault

Last local AC circuit status rcvd: No fault

Last local AC circuit status sent: No fault

Last local PW i/f circ status rcvd: No fault

Last local LDP TLV

status sent: No status

Last remote LDP TLV status rcvd: Not sent

Last remote LDP ADJ status rcvd: No fault

MPLS VC labels: local 32702, remote 32702 –

Group ID: local 498, remote 498

MTU: local 0, remote 0

Sequencing: receive disabled, send disabled

Control Word: On (configured: autosense)

SSO Descriptor: 209.165.201.5/40004010, local label: 32702

Dataplane:

SSM segment/switch IDs: 12313/16408 (used), PWID: 2

VC statistics:

transit packet totals: receive 0, send 0

transit byte totals: receive 0, send 0

transit packet drops: receive 0, seq error 0, send 0

With L2VPN Xconnect Configuration:
· Use the show run | sec pseudowire99 and show run | sec l2vpn commands to verify the MPLS label configuration with L2VPN Xconnect :
Router#show run | sec pseudowire99 interface pseudowire99
encapsulation mpls signaling protocol none neighbor 10.1.1.1 1 label 27001 27001
Router#show run | sec l2vpn l2vpn xconnect context cem_static
member CEM0/3/0 0 member pseudowire99
· Use the show mpls l2 vc vc-id detail command to display detailed information related to the virtual connection (VC) with the signaling protocol manual configuration:
Router# show mpls l2 vc 1 detail
Local interface: CE0/3/0 up, line protocol up, SATOP T1 0 up Destination address: 10.1.1.1, VC ID: 1, VC status: down Last error: MPLS dataplane reported a fault to the nexthop Output interface: none, imposed label stack {} Preferred path: not configured Default path: no route

Support for Static MPLS Labels on Cisco RSP3 Module 7

Verification of Static Label Pseudowire Provisioning for CEM Configuration

Support for Static MPLS Labels on Cisco RSP3 Module

No adjacency

Create time: 00:04:40, last status change time: 00:04:40

Last label FSM state change time: 00:04:40

Signaling protocol: Manual

Status TLV support (local/remote) : enabled/N/A

LDP route watch

: enabled

Label/status state machine

: activating, LruRruD