Users Guide

● The destination IP address must be on a remote L3 node that supports standard GRE decapsulation.
● If the destination IP address is not reachable, the session goes down.
● OS10 does not support an ERPM destination session and decapsulation of ERPM packets at the destination switch.
● You can configure a maximum of four ERPM sessions with a maximum of 128 source ports in each session. You can configure
these four ERPM sessions in one of the following methods:
○ Single directional with either four ingress or four egress sessions.
○ Bi-directional with two ingress and two egress sessions.
● You can monitor a source VLAN only through flow-based monitoring. Only ingress is supported in flow-based source VLAN
monitoring.
● You cannot configure an interface with ERPM traffic as a source for an ERPM session.
● You cannot monitor an RPM VLAN as a source.
● You cannot configure the same destination IP address for two sessions.
● You cannot configure an interface that serves as egress for a GRE tunnel as a source interface.
● ERPM supports only GRE-over-IPv4 tunneling.
● ERPM does not support Equal Cost Multi Path (ECMP).
● You can use third-party devices as only tunnel-transit devices.
● OS10 does not support monitoring VLAN subinterfaces and CPU-generated packets.
Configure encapsulated remote port monitoring
Encapsulated remote port monitoring requires valid source and destination IP addresses. Ensure that the source IP address is
local and destination IP address is remote. You can also configure the time-to-live (TTL) and differentiated services code point
(DSCP) values.
1. Create monitoring session in CONFIGURATION mode.
monitor session session-id type erpm-source
2. Configure source port in MONITOR-SESSION mode.
source interface interface-type {both | rx | tx}
3. Configure source and destination IP addresses, and protocol type in MONITOR-SESSION mode.
source-ip source ip-address destination-ip destination ip-address [gre-protocol
protocol-value]
4. Configure TTL and DSCP values in MONITOR-SESSION mode.
ip {ttl ttl-number | dscp dscp-number}
5. Enable the monitoring interface in MONITOR-SESSION mode.
no shut
Create monitoring session
OS10(config)# monitor session 10 type erpm-source
OS10(conf-mon-erpm-source-10)#
Configure source port, source and destination IP addresses, and protocol type
OS10(conf-mon-erpm-source-10)# source interface ethernet 1/1/2
OS10(conf-mon-erpm-source-10)# source-ip 1.1.1.1 destination-ip 3.3.3.3 gre-protocol
35006
OS10(conf-mon-erpm-source-10)# ip ttl 16
OS10(conf-mon-erpm-source-10)# ip dscp 63
OS10(conf-mon-erpm-source-10)# no shut
View configured ERPM session
OS10(conf-mon-erpm-source-6)# do show monitor session all
S.Id Source Destination Dir Mode Source IP Dest IP DSCP TTL Gre-Protocol
State Reason
518
Layer 2