Dell MX5108n OS10 Enterprise Edition User Guide for PowerEdge MX IO Modules Re - Page 513

continue Clause, ACL flow-based monitoring, Flow-based mirroring

Page 513 highlights

• Enter an ORIGIN attribute in ROUTE-MAP mode. set origin {egp | igp | incomplete} • Enter a tag value for the redistributed routes in ROUTE-MAP mode, from 0 to 4294967295. set tag tag-value • Enter a value as the route's weight in ROUTE-MAP mode, from 0 to 65535. set weight value Check set conditions OS10(config)# route-map ip permit 1 OS10(conf-route-map)# match metric 2567 continue Clause Only BGP route-maps support the continue clause. When a match is found, set clauses run and the packet is forwarded - no routemap processing occurs. If you configure the continue clause without configuring a module, the next sequential module processes. If you configure the continue command at the end of a module, the next module processes even after a match is found. The example shows a continue clause at the end of a route-map module - if a match is found in the route-map test module 10, module 30 processes. Route-map continue clause OS10(config)# route-map test permit 10 OS10(conf-route-map)# continue 30 ACL flow-based monitoring Flow-based monitoring conserves bandwidth by selecting only the required flow to be mirrored instead of mirroring entire packets from an interface. This feature is available for L2 and L3 ingress traffic. Specify flow-based monitoring using ACL rules. Flow-based monitoring copies incoming packets that match the ACL rules applied on the ingress port and forwards (mirrors) them to another port. The source port is the monitored port (MD), and the destination port is the monitoring port (MG). When a packet arrives at a monitored port, the packet validates against the configured ACL rules. If the packet matches an ACL rule, the system examines the corresponding flow processor and performs the action specified for that port. If the mirroring action is set in the flow processor entry, the port details are sent to the destination port. Flow-based mirroring Flow-based mirroring is a mirroring session in which traffic matches specified policies that are mirrored to a destination port. Port-based mirroring maintains a database that contains all monitoring sessions, including port monitor sessions. The database has information regarding the sessions that are enabled or not enabled for flow-based monitoring. Flow-based mirroring is also known as policy-based mirroring. To activate flow-based mirroring, use the flow-based enable command. Traffic with particular flows that are traversing through the ingress interfaces are examined. Appropriate ACL rules apply in the ingress direction. By default, flow-based mirroring is not enabled. To enable the evaluation and replication of traffic traversing to the destination port, configure the monitor option with the permit, deny, or seq commands for ACLs assigned to the source or the monitored port (MD). Enter the keywords capture session session-id with the seq, permit, or deny command for the ACL rules to allow or drop IPv4, IPv6, ARP, UDP, EtherType, ICMP, and TCP packets. IPV4-ACL mode seq sequence-number {deny | permit} {source [mask] | any | host ip-address} [count [byte]] [fragments] [threshold-in-msgs count] [capture session session-id] Access Control Lists 513

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Enter an ORIGIN attribute in ROUTE-MAP mode.
set origin {egp | igp | incomplete}
Enter a tag value for the redistributed routes in ROUTE-MAP mode, from 0 to 4294967295.
set tag
tag-value
Enter a value as the route’s weight in ROUTE-MAP mode, from 0 to 65535.
set weight
value
Check set conditions
OS10(config)# route-map ip permit 1
OS10(conf-route-map)# match metric 2567
continue Clause
Only BGP route-maps support the
continue
clause. When a match is found,
set
clauses run and the packet is forwarded — no route-
map processing occurs. If you
configure
the
continue
clause without
configuring
a module, the next sequential module processes.
If you
configure
the
continue
command at the end of a module, the next module processes even after a match is found. The example
shows a continue clause at the end of a route-map module — if a match is found in the route-map
test
module 10, module 30 processes.
Route-map continue clause
OS10(config)# route-map test permit 10
OS10(conf-route-map)# continue 30
ACL
flow-based
monitoring
Flow-based monitoring conserves bandwidth by selecting only the required
flow
to be mirrored instead of mirroring entire packets from an
interface. This feature is available for L2 and L3 ingress
traffic.
Specify
flow-based
monitoring using ACL rules. Flow-based monitoring
copies incoming packets that match the ACL rules applied on the ingress port and forwards (mirrors) them to another port. The source
port is the monitored port (MD), and the destination port is the monitoring port (MG).
When a packet arrives at a monitored port, the packet validates against the
configured
ACL rules. If the packet matches an ACL rule, the
system examines the corresponding
flow
processor and performs the action
specified
for that port. If the mirroring action is set in the
flow
processor entry, the port details are sent to the destination port.
Flow-based mirroring
Flow-based mirroring is a mirroring session in which
traffic
matches
specified
policies that are mirrored to a destination port. Port-based
mirroring maintains a database that contains all monitoring sessions, including port monitor sessions. The database has information
regarding the sessions that are enabled or not enabled for
flow-based
monitoring. Flow-based mirroring is also known as
policy-based
mirroring
.
To activate
flow-based
mirroring, use the
flow-based enable
command.
Traffic
with particular
flows
that are traversing through the
ingress interfaces are examined. Appropriate ACL rules apply in the ingress direction. By default,
flow-based
mirroring is not enabled.
To enable the evaluation and replication of
traffic
traversing to the destination port,
configure
the monitor option with the
permit
,
deny
,
or
seq
commands for ACLs assigned to the source or the monitored port (MD). Enter the keywords
capture session
session-id
with the
seq
,
permit
, or
deny
command for the ACL rules to allow or drop IPv4, IPv6, ARP, UDP, EtherType, ICMP, and TCP packets.
IPV4-ACL mode
seq
sequence-number
{deny | permit} {source [mask] | any | host
ip-address
} [count [byte]]
[fragments] [threshold-in-msgs
count
] [capture session
session-id
]
Access Control Lists
513