Users Guide

• The system allows to configure up to four ERPM sessions.
• ERPM sessions do not copy locally sourced remote VLAN traffic from source trunk ports that carry RPM VLANs.
ERPM sessions do not copy locally sourced ERPM GRE-encapsulated traffic from source ports.
• Source VLAN monitoring is possible only for ingress packets and is not supported for egress direction.
• A flow-based source VLAN is monitored only for ingress traffic (not egress traffic). direction.
Changes to Default Behavior
• Rate-limiting ïs not supported for ERSPAN traffic.
• You can configure the same port as both source and destination in an ERSPAN session.
• You can configure TTL and ToS values in the IP header of ERSPAN traffic.
Configuration steps for ERPM
To configure an ERPM session:
Table 64. Configuration steps for ERPM
Step Command Purpose
1
configure terminal
Enter global configuration mode.
2
monitor session <id> type erpm
Specify a session ID and ERPM as the type of
monitoring session, and enter Monitoring-Session
configuration mode. The session number needs to be
unique and not already defined.
3
source { interface | range } direction
{rx | tx | both}
Specify the source port or range of ports. Specify the
ingress (rx), egress (tx), or both ingress and egress
traffic to be monitored. You can enter mulitple source
statements in an ERPM monitoring session
4
erpm source-ip <id> dest-ip <id>
Specify the source IP address and the destination IP
address to which encapsulated mirrored traffic is sent.
5
no flow-based enable
ERPM to be performed on a flow-by-flow basis or if
you configure a VLAN source interface. Enter the no
flow-based command to disable to disable flow-
based ERPM.
6
no disable
Enter the no disable command to activate the ERPM
session..
The following example shows an ERPM configuration .
Dell(conf)#monitor session 0 type erpm
Dell(conf-mon-sess-0)#source tengigabitethernet 1/9 direction rx
Dell(conf-mon-sess-0)#source port-channel 1 direction tx
Dell(conf-mon-sess-0)#erpm source-ip 1.1.1.1 dest-ip 7.1.1.2
Dell(conf-mon-sess-0)#no disable
Dell(conf)#monitor session 1 type erpm
Dell(conf-mon-sess-1)#source vlan 11 direction rx
Dell(conf-mon-sess-1)#erpm source-ip 5.1.1.1 dest-ip 3.1.1.2
Dell(conf-mon-sess-1)#flow-based enable
Dell(conf-mon-sess-1)#no disable
Dell# show monitor session
SessID Source Destination Dir Mode Source IP Dest IP
------ ------ ----------- --- ---- --------- --------
0 Te 1/9 remote-ip rx Port 1.1.1.1 7.1.1.2
0 Po 1 remote-ip tx Port 1.1.1.1 7.1.1.2
1 Vl 11 remote-ip rx Flow 5.1.1.1 3.1.1.2
Port Monitoring
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