Aruba Comware Advanced flashcards

32 cards. Read the term and the definition here. The deck at the top of this page is optional.

Comware MDC

Multi-context feature that partitions one physical Comware device into up to four independent logical contexts, each with its own interfaces, routing tables, and administrator login.

IRF member priority

Value from 1 to 32 that determines master election in an IRF fabric; the higher priority wins, with MAC address and uptime as tiebreakers.

MAD detection

Multi-active detection mechanism that detects an IRF split-brain and keeps interfaces down on the losing side to prevent duplicate IP and MAC conflicts.

Configuration rollback

Comware feature that restores a device to a previously saved configuration archive using the configuration replace file command, useful after failed changes.

Hybrid port

Comware port type that allows each VLAN to be carried as tagged or untagged independently, making it a superset of access and trunk behavior.

QinQ tunneling

802.1ad technique that adds an outer service VLAN tag to customer frames, allowing a provider to transparently carry multiple customer VLANs.

LACP system priority

Value from 1 to 65535 where lower wins; combined with port priority it determines which member links become Selected versus Standby in a dynamic aggregation.

MSTP region digest

Configuration checksum derived from region name, revision level, and VLAN-to-instance mapping; mismatched digests place switches in different MSTP regions.

OSPF cost formula

Interface cost equals reference bandwidth divided by interface bandwidth, where reference bandwidth defaults to 100 Mbps and is changed with bandwidth-reference.

OSPF ExStart state

Neighbor state where master/slave negotiation begins; neighbors stuck here typically indicate an MTU mismatch between the two interfaces.

BGP weight

Cisco-style attribute local to the router, highest wins, evaluated first in the BGP best-path algorithm before local preference and AS path length.

IS-IS NET address

Network entity title composed of area ID, system ID, and NSEL byte 00; the system ID must be unique within the IS-IS routing domain.

RIPv2 multicast address

RIPv2 sends updates to 224.0.0.9 instead of broadcast, supports VLSM and authentication, and limits hop count to 15 with 16 meaning unreachable.

NDP neighbor solicitation

IPv6 message used for address resolution and duplicate address detection, replacing ARP; the target replies with a neighbor advertisement.

SLAAC

Stateless address autoconfiguration where a host builds its IPv6 address from an RA-advertised prefix plus an EUI-64 or stable-privacy interface identifier.

PIM-SM rendezvous point

Router that joins sources and receivers on a shared tree; traffic then switches to a shortest-path tree toward the source.

IGMPv3 source filtering

IGMP version that lets receivers request or exclude specific multicast sources, enabling source-specific multicast with PIM-SSM.

MPLS PHP

Penultimate hop popping: the router before the egress LER removes the outer label so the egress receives an unlabeled or single-labeled packet.

Route distinguisher

8-byte value prepended to customer prefixes in MP-BGP VPNv4/VPNv6 to make overlapping addresses unique across VRFs.

Route target

BGP extended community attached to VPN routes that controls which VRFs import or export the route, forming the VPN topology.

RSVP-TE

Signaling protocol used by MPLS traffic engineering to reserve bandwidth and establish label-switched paths along CSPF-computed explicit routes.

Advanced ACL

Comware ACL type matching source and destination IP, protocol, and port numbers; applied per interface in inbound or outbound direction.

HWTACACS

Comware-supported AAA protocol over TCP 49 that provides authentication, authorization, accounting, and per-command authorization for device administration.

802.1X authentication

Port-based access control using EAPoL between supplicant and switch and RADIUS between switch and authentication server to authorize port access.

DHCP snooping

Security feature that filters untrusted DHCP server messages and builds a binding table used by IP Source Guard and dynamic ARP inspection.

VRRP priority

Value from 1 to 254 where higher wins master election; 255 is reserved for the IP address owner, and preemption is enabled by default on Comware.

BFD

Bidirectional forwarding detection protocol that provides sub-second link failure detection for routing protocols and VRRP using short hello intervals.

DSCP field

Six-bit field in the IP header (values 0-63) used for QoS classification and marking; Comware trust modes include untrust, dot1p, dscp, and auto.

WRED

Weighted random early detection congestion avoidance that drops packets probabilistically based on queue depth and DSCP to prevent tail-drop synchronization.

CAR policing

Committed access rate function that meters traffic against committed and peak rates using a token bucket and marks or drops excess packets.

NQA probe

Network quality analyzer test (ICMP, TCP, UDP, HTTP) that measures latency, jitter, and packet loss and can trigger VRRP or route tracking.

Info-center log levels

Comware severity scale from 0 (emergency) to 7 (debugging); lower numbers are more severe and are sent to logbuffer, trapbuffer, or syslog servers.